Heads stamped RHS20 and LHS20: Alright, read this thread like 4 times, cant seem to find anything on my heads. I do about 8000-10000kms per year. I've just read so much hate towards the 208 on all forums i don't know why that is. 4HKS V 213121431 GC8 EJ207 24996- AK012. The crankcase of these engines has five main journals, and the flywheel housing was cast with the crankcase for increased rigidity. EJ207 10/07-14/08 33005-AF014 226,000 6MT,tStS Type RASPEC CS206 It is a bad sign, and you solve the problem only by means of overhaul. But with the newer style of engine it wasn't needed on NA engines. For reader, considering you are hunting the Ej207 Engine store to right of entry this day, this can be your referred book. Also it was equipped with a new intake manifold, 550 cc fuel injectors and other camshafts. This often happens with turbo EJ20, dont be surprised. Bugeye was good for something huh. Datos del Manual. Same with the EJ20, though it has strong internals and reliable block can still be caught off guard of some issues. 7 JDM EJ207 STI engine to a. Differences between EJ20K and EJ20G are the following: open deck block, TD04 turbocharger, modified intake manifold, increased intercooler, moly coated pistons (compression ratio = 8), new ignition coils and new ECU. Subaru Impreza WRX with EJ205 engine used Mitsubishi TD04 turbocharger, with max boost pressure 14.5 psi (1.0 bar). EJ20K engine was installed on 1996-1998 Impreza WRX STI and used IHI RHF5HB turbocharger. Definitely you dont want problems with the engine, so use high-quality original engine oil. NOTE: As of January 2021 we are longer wiring Version 1 through 6engine swaps. 207 is the way to go as far as a factor block is concerned. Version 7 STI EJ207, stamped S20C 701 -1. This motor is a competent performer, but has significant differences from the EJ205 found in the USDM 2002-2005 WRX. There are no TGVs also. It has an aluminum block with 92 mm bores with cast iron cylinder liners and a 75 mm piston stroke for a capacity of 500 cc per cylinder, with thicker cylinder walls. Identifying marks: Looks similar to EJ20K, but coil pack is offset from center on intake manifold. Power Rating. gc8d48d . Specially for 2003-2009 Legacy (BL), EJ202 engine was improved: it uses lightweight cylinder block with lightweight sleeves, modified intake manifold and 4-2-1 headers. Like we mentioned above, the EJ20 series became prosperous due to its tuning and upgrade potentials. It's easy! Updated 02/13/2017. IAG Stage 2 Tuff 2.5L Subaru Short Block for 2002-14 WRX, 2004-16 STI, 2005-12 Legacy GT and 2004-13 Forester XT. Are you put off by the rising costs of aftermarket modification and long wait times for parts and tunes? Next is the EJ207, which was produced for the GC8 in UK, Japan, and Australia. The first is the shim over bucket style and shim under bucket style. xe dl . EJ207 engine for 2003+ Impreza WRX STI used VF37 twin scroll turbocharger. Enviado por valvulita el Sb, 05/26/2018 - 10:51. You'd save yourself a lot of headache buying a gc impreza to swap that into. EJ20 engine has aluminum flat-four cylinder block, with cast-iron dry sleeves. Be kind enough to explain please, Biggest difference would be semi closed deck vs open deck for the 208, There is a gen 3 outback on this forum with tt on e85 and it seems to be lasting at 300hp at the wheels. These engines are newer, more reliable, and more powerful than older JDM engines. For Subaru Legacy GT, EJ20G engine produces 220 HP at 6,400 rpm, and torque is 270 Nm at 4,000 rpm. Except EJ20, the EJ series included: EJ15, EJ16, EJ18, EJ22 and EJ25. I have read on some other sites that the ej257 has issues with strength vs the reliable ej207. That's what I think about. Subaru Impreza WRX STi Spec C Type RA car used IHI VF34 turbocharger. What I really want to get at is. STI Version 9 EJ207 Semi closed deck block stamped T20C STI Version 10 EJ207 Semi closed deck block stamped W20C STI EJ257 Semi closed deck block stamped B25C Then there's also a difference in bore wall and stiffener thickness through the EJ207 STI block: S20C --- 9.6mm Version 7 EJ207 T20C ---- 9.6mm Version 8/9 EJ207 7900 redline. CrawfordSPEC Forged WRX Internals (EJ20/EJ255) $ 749.95. A new TD05-18G turbocharger, HKS blow-off valve, fuel lines, 800 cc/min fuel injectors, heavy-duty timing belt, cold air intake, oil cooler, 12 mm oil pump, equal length headers, and a 3-inch aftermarket exhaust system. Updated 02/13/2017 Subaru EJ20 Engine Specifications Overview, problems Performance tuning Subaru EJ20 engine specs Subaru EJ20 engine reliability, problems and repair USD. If it\'s OEM? So, as far as i get it, you re-used most of the parts of your K engine? After installing these parts and configuring the ECU, the EJ205 can reach about 300 HP. rio tinto dividend forecast 2022. cycling bright to harrietville. Its power is 250 HP at 6,000 rpm. Or it could be that with the EJ20H and EJ20K they could manufacture engines that wouldn't blow the HG's. JDM 2008-2014 Subaru WRX STi EJ207 Ver.10 2.0L Engine Swap with VF49 Twin Scroll Turbocharger for sale. * Registered users of the site do not see these ads. "SubaruTuning25" EJ207 AVCS EJ207DW3CR + Tomei + Zerosports Subaru Impreza WRX STI GD GG GC GF SF SG BE BH [22824] 399 999. 2000-2003 Subaru WRX STI used IHI VF30 turbocharger (VF35 turbocharger for JDM WRX Type RA) which created charging pressure 16 psi (1.1 bar). We highly suggest if you are looking for a swap engine to check out these options. EJ205 engine for 2000-2007 Impreza WRX was equipped with variable valve timing system AVCS on intake camshafts. Also EJ201 and EJ202 used the new intake manifold which is good at low and mid rpm. Thanks for clarifying what you meant. This 2-liter motor replaced 1.8 liter EA82. Edit: JDM version 7 WRX (GDA) head stamp codes added to the list in first post, RHS20 and LHS20. Find many great new & used options and get the best deals for 96 Subaru Impreza STI JDM Ej20k Engine Long Block Bad Compression Gc8 WRX at the best online prices at eBay! Subaru EJ205 engine for Forester had a compression ratio 8.5 and used Mitsubishi TF035 turbocharger. EJ205 vs. EJ207 - NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) * As an Amazon Associate I earn from qualifying purchases. Use high-quality original engine oil. Used Subaru Impreza WRX JDM EJ207 Engine Version 7 with VF30 Single Scroll Turbo, TMIC and Ecu for Sale. Camshafts are set in motion with the help of timing belt. ej20k vs ej207. Coil pack centered on intake manifold. 3. It utilizes an IHI ball-bearing turbo, VF23, or VF24 on the STI. Version 5 STI Head Stamp codes and Pics added. Powered by - Designed with theHueman theme, Normal engine operating temperature, C (F), Subaru EJ20 engine reliability, problems and repair. 8 STI Motor Swap for 2002-2005 Impreza WRX with TMIC and ECU Package for sale. Non Turbo Cars. Edit: JDM version 7 WRX (GDA) head stamp codes added to the list in first post, RHS20 and LHS20. Essential accessories: Sensor group that is located on the strut tower bracket (passenger side for left hand drive countries); mass airflow sensor with housing. There was also twin turbo EJ208 engine which used VF25 and VF26 turbochargers in the first generation, then VF31 and VF32 turbochargers were used. If your country has a hard time finding quality gasoline, use the best option. 280 . Owners of naturally aspirated EJ20 dont need to worry, reliability and longevity of your motor is higher and can reach 150,000 mile of mileage (250,000 km) and more. I think we all can nod our heads that all engines are not perfect far from being there. The boost pressure was 15.5 psi (1.07 bar), and power reached 280 HP at 6,500 rpm, torque was 343 Nm at 4,000 rpm. Looking to EJ207 swap your Subaru? Yeah lightly tuned and my cars don't go in the same sentence. These engines feature lighter valves, STI factory 8.5 compression rating, INKO marked intake valves, and EXKO marked exhaust valves. We highly suggest if you are looking for a swap engine to, If you have a V5/6 we can wire it up if you convert it to match an 02-05 WRX. standard 2.0L WRX is right around 8.5, Manley has a 2618 alloy 16cc dish piston with normal comp height in their catalog (0.3xmm clearance to deck) ~8.6:1 if you bore to 92.5mm. The intake manifold is one piece, the spark plugs are one step colder compared to other STIs. Its power is 200 HP at 6,000 rpm, and its torque is 260 Nm at 3,600 rpm. The first version of this engine was called EJ20E and it was installed on Subaru Legacy. Call us at (425) 485-6059. The shim-over-bucket style EJ20G engine was installed in Japanese Impreza WRX or European 1997-1998 Impreza Turbo. just trying to do some digging on it, it came with pink 550cc injectors, ive read it might have some aggressive cams but no clue. but still Subaru used the 208 on the s401 they could have gone 207 to make it perfect but they didn't they used the 208. That is the only difference as far as I know. Th EJ20X has a forged crankshaft and connecting rods with cast aluminum pistons with forged crowns. There is no sense to increase N/A EJ20 power. EJ20K engine was installed on 1996-1998 Impreza WRX STI and used IHI RHF5HB turbocharger. I had to add this thread for info purpose.. Subaru Impreza GC8 & RS Forum & Community. new 765121546 blitz gc8 ej20k/ej207 26131 TET-S-180A 1800750800mm 50 60Hz . The new turbo motor EJ20K came out in 1996. Couldn't fault it. Differences between EJ20K and EJ20G are the following: open deck block, TD04 turbocharger, modified intake manifold, increased intercooler, moly coated pistons (compression ratio = 8), new ignition coils and new ECU. Has forged pistons as well. Click here for instructions on how to enable JavaScript in your browser. Its cylinder block deck height is 201 mm. Hola amigos, en esta oportunidad les traemos los ECU Pinout o diagrama de pines de las ECU de Subaru para los motores EJ20K, EJ20G y EJ207. It is possible to increase EJ20 capacity to 2,123 cc. My original EJ206 (minor differences between 208 & 206, 206 is on an AT and 208 MT) pulled hard and barely consumed oil after a hard 16 year life. Also EJ204 used variable valve timing system AVCS on intake camshafts, adjustment range is 50 degrees. The fourth cylinder is the hottest, but the worst cooled among other cylinders; hence the pistons begin to knock. DOHC 16 valve turbo. Incorrect. As with all JDM motors, the ECU tune is designed around running a higher-octane fuel than is available in the United States. Also keep mind that they are comparing the ej207 to a ej255, although I'm pretty sure the castings on the ej255 and ej257 are the same (I could be wrong). EJ207's are OBD1 and take a bit of work to make possible to pass emissions testing in a 96+ vehicle. There's quite a few variables involved to come to the best decision but here's my take on it having built a good many of each. Used JDM v5 GC8 Type-RA EJ207 EJ20K OEM Intake Manifold Assembly for Sale. Power increased up to 260 HP at 6,500 rpm. Ej207 is going to be a massive project. EJ20H engine differs in that it uses DOHC cylinder heads and two VF13 and VF14 turbochargers. These EJ20Gs can be identified through a tab on the right surface of the block half and a smoother surface. GF-GC8 EJ20K, EJ207 96 09-00 trademarketingforce.com.br 213142399 33005-AF003 HKS GC8 EJ207 5MT trademarketingforce.com.br 213142399 . Yeah those were the stamps on the engine that I bought which I was totally lied to about(finally have court date ). March 15, 2014 in Engine Related, EJ207 Engine Identification by Stamp Code %100 confirmed. Item ID 7708 Model (s) WRX STi 2002-2007 (Cable Throttle) Show More (High Silicon Based Cast Alloy). I think bore and stroke are the same. It is possible to increase the engine capacity of your EJ20 to 2.2 Liters, but you will need a stroker that includes an EJ25 crank, Mahle pistons, ARP head studs, and H-beam rods. If you are looking for information about the newer JDM Engines, 2001+ please check out this POST. It still leaps to the red line, does not consume oil or coolant, has no compression or crankcase pressure issues and has passed 480,000 kilometers replacing 3 sets of plugs, 4 timing belts, 2 water pumps a turbo and the usual suspension joints. Stroker kit includes EJ25 crank, H-beam rods, Mahle pistons, ARP head studs. Running one or the other gives the crank too much end play. At first the engine knocks at cold start, and then all the time. But what makes EJ20 such a charismatic and powerful engine? This version 7 Ej207 engine is very sought after in the tuners world for it's performance and reliability when done correctly. Recommended Posts. After 2001, all WRX vehicles use EJ205 until 2006, when USDM WRX models changed their engines to EJ255. Their power is 150 HP at 6,800 rpm. Yeah, even many books are offered, this book can steal the reader heart Page 1/2. I think most people don't understand the REAL reason for the different deck styles. Text Size:millwork district dubuque apartments why did jillian leave workaholics. Engine management (optional but recommended for older JDM motors): $1614, Note - Vipec also makes a PnP ECU for these setups. I dont mean to threadjack at all, but I enjoyed the read and it left me with a question so the advantage of the ej207 is obviously in the heads, but if you were building a 2.1L would it be "stronger" with the 207 vs the 205. Subaru has used this updated version across all WRX models since early 1992. gaskets seat for sale, gaskets tappets replacement parts, gaskets tappets spares, gaskets tappets spares to buy, gaskets tappets parts shop, auto parts store, new and used gaskets tappets, tappets parts To add, the intake manifold is red for all STI models. Not the S20C 701 -1. EJ20K, phase 1. thrust @ 3. Clean and Low Mileage JDM 2008-2014 Subaru WRX STi EJ207 Ver.10 2.0L Engine Swap with Ball Bearing VF49 Twin Scroll Turbo, 2015-2020 JDM Subaru WRX STi VAB EJ20Y Engine 2.0 Twin Scroll VF49 Turbo Very Low Original Miles EJ207, JDM Subaru WRX STi VA EJ20Y Engine 2.0 Twin Scroll Dual AVCS with VF49 Turbo Very Low Original Miles EJ207. The capacity of the EJ20G stock fuel injectors is 380 cc. Sign up for a new account in our community. HKS GC8 EJ20K 5MT 33005-AF003 (213142399 . Please refer to all actual item photos for a complete cosmetic description on the engine. EJ20 motors gained great popularity due to their turbocharged versions. EJ207 heads (S20V) on EJ207 heads is the same damn engine with a slightly lower compression ratio. To attain more than 350 HP of power on your EJ207 engine. V1 uses 3 smaller plugs for camshaft position, crankshaft position, and the knock sensor while V2 combines these into a single 12 pin connector. will the 2.2L impreza L tranny fit on the EJ20 engine. Please see all item photos for complete cosmetic condition and full description of any imperfections. EJ20G engine for 1995-1996 Subaru Impreza STI ver. For a better experience, please enable JavaScript in your browser before proceeding. jessica parker journalist father. Please see all item photos and video for the complete condition of the engine for sale. haha could have sworn it did somewhere though. Then there's also a difference in bore wall and stiffener thickness through the EJ207 STI block: Version 7, JDM STI EJ207, S20C - Forged Molybdenum. I would not pin the bores they will still warp.. It is a reasonable limit for EJ207 stock internals. Version 6 STI Heads stamped LH C 006 and RH C 007: 12200AA210 - BE/BH EJ206/EJ208 ----------------OEM cross drilled crank, 12200AA240 - Version 5/6/7 STI EJ207/EJ205 -- OEMcross drilled crank, 12200AA270 - Version 8/9 STI EJ207 GDBC ---- OEM double cross drilled and nitrated crank (better oiling and hardened - black colouring), 12200AA390 - Version 10 STI EJ207 GRB ------- OEM double cross drilled and nitrated crank (better oiling and hardened - black colouring). The Version 5 and 6 longblocks can be converted to work with the wiring and ECU found in the 2002-2005 USDM WRX. The Version 5 and 6 EJ205 and EJ207 is a good motor, but it is over 15 years old now. It comes with twin scroll VF49 ball bearing turbo. AFAIK they are BE/BH rev D-E heads, but don't quote me on it just yet. Check them. Turbocharged EJ20G was the first such engine. The EJ20G continued to be the primary engine in the WRX wagon with an automatic transmission from 1996 until 1998; then, it was replaced by the EJ205. Since 2012 turbo EJ20 was being replaced by 2.0 liter FA20 engine while naturally aspirated EJ20 were replaced by FB20. They stuck with it on the turbo engines for a while though. Engine/Drivetrain/Performance Parts For Sale | IW STi Forum PISTON KIT 123cc Super Head 4Valve SALE . 1.Series code G=Impreza S=Forester B=Legacy etc. Not that monstrous kind of engine, but it will still be worthy of being put as a sleeper, in my opinion. sale57%off blitz sus power 96 09-00 08 gc8 ej20k,ej207 26131 saloniki.co.il; air cleaner | blitz; sus power air cleaner | blitz; sus power air cleaner | blitz Some pics and info on the different cams in here: http://clubsub.org.nz/forum/showthread.php?42216-Heads. I'm trying to grasp just power in general, how it is made, and what makes more power. Thanks guys! EJ20 oil leak. Jan 8, 2011. Downpipe is not included***. Indeed that is a bad sign for your machine, nothing comes good from that sound, though, so you will need to keep a budget aside and overhaul it. Another issue that needs to be addressed is the excessive oil consumption of the EJ20, especially the turbocharged ones, and can affect small sizes of naturally aspirated engines. This is not new to the engines because others experience this too. Dont forget to use high-quality engine oil and fuel for better engine performance. Free shipping for many products! The engines of the Impreza WRX and STI should be overhauled every 60,000 miles. EJ20G engine for 1995-1996 Subaru Impreza STI ver. Also these motors used the intake manifold with TGV valves (Tumble generator valves) that improved ecological index and the increased compression ratio to 9. EJ20K crank (thrust 3) (forged) USDM STi EJ257 rods (forged) EJ20K STi pistons (forged) ACL race bearings ARP head studs Cometic head gaskets (actual OEM Subaru EJ20K STi head gaskets are hard to get in the USA) EJ20K STi heads (checked all valve lash and swapped around a few shims) EJ208 rev D phase 3 engine uses VF33 and VF32 turbochargers, and their boost pressure is 13 psi (0.9 bar). EJ205 and EJ207 engines are equipped with new cylinder heads, the intake ports has been modified, Lightweight pistons were used and new ECU. You will receive the same engine shown. Is this true for Australian delievered EJ257s? Power of EJ20R reached 280 HP. I may have to rethink my plans of a daily driven 400whp sti. EJ207 crankshaft differences: 12200AA210 - BE/BH EJ206/EJ208 ---------------- OEM cross drilled crank 12200AA240 - Version 5/6/7 STI EJ207/EJ205 -- OEM cross drilled crank 12200AA270 - Version 8/9 STI EJ207 GDBC ---- OEM double cross drilled and nitrated crank (better oiling and hardened - black colouring) Its power is 250 HP at 6,000 rpm. Max boost pressure for Impreza WRX sedan is 11.5 psi (0.8 bar), and power is 240 HP at 6,000 rpm. The first version of this engine was called EJ20E and it was installed on Subaru Legacy. 0.6mm is too short for Phase 1. WRX Version 5/6/7 EJ205 Open deck block stamped R20, STI Version 5/6 EJ207 Open deck block stamped R20, STI Version 7 EJ207 Semi closed deck block stamped S20C, STI Version 8 EJ207 Semi closed deck block stamped T20C, STI Version 9 EJ207 Semi closed deck block stamped T20C, STI Version 10 EJ207 Semi closed deck block stamped W20C, STI EJ257 Semi closed deck block stamped B25C. EJ20 engines became more renowned due to their turbocharged versions. About 5 bank accounts, 3 ounces and 2 vehicles. Here is a very clean JDM 2008 to 2014 Subaru STi Ver.10 EJ207 Replacement or Swap Engine with VF49 Twin Scroll Turbocharger, Dual AVCS Motor Package. On WRX STI Spec-C versions you will find VF36 twin scroll turbocharger. Everything we need to do is to buy EJ205 or EJ207 and to make swap. Home; Services; New Patient Center. contact a headgames. 2.0 and well i ended up with it for a VW bug / subaru swap. Mine didn't. This motor used Mitsubishi TD04 turbocharger, and the maximum boost pressure is 11 psi (0.75 bar). A forum community dedicated to Subaru Impreza GC8 and RS owners and enthusiasts. Here is a clean low mileage JDM EJ207 version 7 engine imported directly from Japan. I also might stick to the proven 207. Here is a clean and compression tested JDM EJ20Y STI off of a GR Chassis. . Everything we need to do is to buy EJ205 or EJ207 and to make swap. 1 All of these camshafts for EJ20G need to trim your cylinder head. EJ257. To reach beyond the 500 HP mark on the EJ207 engine, you need head porting and forged pistons. Forged pistons. The Subaru EJ20 cylinder block is made from aluminum with cast-iron dry sleeves and a block height of 201 mm. Only reason they are probably labelled as weak is the Aus delivered B4's had a crap tune which pinged these engines to death. manual. EJ20 engine has aluminum flat-four cylinder block, with cast-iron dry sleeves. Slanty air-air intercooler on Impreza models, air-water intercooler on Legacy models. EJ203 motor differs in use of MAF-sensor and electronic throttle body. While Japanese-market motors are often less expensive than equivalent US-market motors, there are things to consider before purchasing a JDM motor. This engine has really low miles and it's in great condition. JavaScript is disabled. You will receive everything shown including the TMIC. SI-Drive - What is it and how does it work. The power of Subaru Legacy 2 and Impreza first generations are increased to 135 HP. The content and theme of this book in reality will lie alongside your heart. This is some decent information, but it seems that Subaru does it's normal thing to sell 5,000 variations in the same shell: Really, so do you have a link for the with that information? 2000-2003 Subaru WRX STI used IHI VF30 turbocharger (VF35 turbocharger for JDM WRX Type RA) which created charging pressure 16 psi (1.1 bar). Passing emissions with either of these engines is for practical purposes impossible. EJ203 is characterized by the use of a MAF sensor and has an electronic throttle body. I still have 2 x 4wd 1992 wagons with 122-165K km on the clock. The limit is 0.8mm for Phase 1. What we will do is to buy an EJ207 or EJ205 and to make a swap. So ive been reading that the Ej20 has a greater VE, "can spool bigger turbos" due to the TS turbo setup, and are more bullet proof (some say because the US has bad gas/ringland issues" Vs the Ej25. Their boost pressure is 13 psi (0.9 bar), and power is 260 horsepower. Below is a cost breakdown of parts for a typical EJ20K conversion: Breakdown of costs: Engine: $1149 Wiring harness: $600 ECU: $200 Turbo engine crossmember: $200 Engine management (optional but recommended): $1614 Harness Merge: $630 Total: $4193 with Haltech Elite, $2779 with OEM ECU Engine: $1149 Wiring harness: $600 ECU: $200 You can tell the difference between V1 and V2 with the connector on the underside of the throttle body. Assuming an R20 code if open deck. Buy a frontal intercooler, a 3-row Mishimoto radiator, Cusco engine mount set, sump baffle plate, TD05-18G turbocharger, HKS BOV, 800 cc fuel injectors, fuel lines, heavy duty timing belt, cold air intake, 12 mm oil pump, oil cooler, equal length headers and 3 inch aftermarket exhaust system. Your assitance would be greatly appriciated. Power of EJ20R reached 280 HP. This is a genuine Subaru EJ207 "Version 7" motor removed from a JDM 02 Impreza STi. Fantastic replys and definitly given me something to think about. And the third is Shim-under-bucket style EJ20G: The power ranges from 217 HP to 271 HP at 6,000 and 6,500, respectively. My 98 version 4 sti had one from factory stamped r20(open rear thrust 8bolt), From my experience i have notice the semi closed blocks are stamped s20c but have not seen this marking on a open yet, I also have a ej25 semi closed block stamped r25 if you wat to lock it in haha. The design is of the older type that protrudes above the deck.. I\'ve only ever seen 1 set and sold them to fbs, there where no markings, I believe they where v2sti Pistons but not 100% on that, v3-V4 forged pistons stamped hf2=A size and HF=B size. . The motor also features a lightweight crank pulley, Samco turbo inlet, HKS oil filter sandwich plate for easy install of an aftermarket oil pressure sensor, and a Pleasure Racing tuned ECU is included, already tuned for the aforementioned mods. I had a v3 STi swap and rebuilt the longblock. Owners of turbocharged EJ205 need to buy only an aluminum 2-row Mishimoto radiator (or something similar), FMIC, STI intake system, VF30 turbocharger, BOV, WRX STI oil pump, new spark plugs, STI fuel injectors, Walbro 255 fuel pump, ACL bearings, boost controller, 3 inch performance exhaust system. Which means the only difference between V5/6 WRX EJ205 and V5/6 STI EJ207, is Pistons/Rods/Crank/Heads. The STI RAs that used these engines received the upgraded Shim-under-bucket style lifters, unlike the standard HLA buckets that WRX and WRX STI had. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. At first, in cold starts, the engine knocks, then all the time after that.