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Engine Internals
CP Forged Pistons
CP WRX & STI forged pistons feature superb ring seal, higher vacuum, lower blow-by, greater durability and increased horsepower and torque through the power band. Better yet, peak horsepower is...
Wiseco Forged Pistons EJ20/EJ25
Wiseco forged pistons utilize the absolute latest technology, including 3D computer-aided design and finite element modeling, to ensure the greatest strength and lightest weight for each application. Rings and wrist...
Eagle ESP H Beam Connecting Rods
Running more boost? Lots of boost? Do it right with some stronger rods from Eagle. With these rods you get the best of both worlds -- weight savings between 30-70...
Manley Connecting Rods
Manley has been in business since 1966 producing aftermarket and OEM engine internals, supplying such cars as the Ford GT. Manley's premier connecting rod series is the Turbo Tuff line...
ARP Head Studs
This ARP head stud set fits all late-model Subaru EJ20 2.0L, EJ22 2.2L, and EJ25 2.5L powerplants. Finish off that engine rebuild with these race proven head studs. Set of...
TR Subaru EJ25/EJ20 Timing Belt Guide
The TR timing belt guide is an easy and efficient modification for all high power EJ25/EJ20 engines. The TR guide is made of thick billet aluminum that replaces your factory...
JDM STi Alternator Cover with 2.5L Badge
This Japanese Domestic Market (JDM) part is from the Japan-market Forester STi. It comes with a handsome 2.5L STi badge pre-installed. Fits all 2003-2008 Forester XT, 2008-2014 WRX, and all...
OEM Subaru Exhaust Valve 2006-2014 WRX / 2004+ STI
Did you know STI exhaust valves are filled with sodium for enhanced valve cooling? That's high-tech stuff! If you need to replace a valve, or a few, we've got you...
OEM Subaru Intake Valve EJ25
If you need to replace a valve, or a few, we've got you covered. These are genuine Subaru intake valves for all Subaru EJ25 models, including 2015+ STI. Does NOT fit 2015+ WRX....
Mach V Air Pump Delete Kit
The Subaru air pump system is one of the most problematic parts of the late-model EJ motor cars. The solenoids often seize up and fail, throwing "check engine" lights and...
Mach V Air Pump Block-Off Kit
If you're turning your street car into a race car and plan to delete the air pump (which is standard-issue on 2006+ 2.5 turbo cars), you'll need something to block off those...
Mach V Subaru EJ25/EJ20 Timing Belt Guide
We didn't like the other timing belt guides on the market, so we made our own! The Mach V timing belt guide ensures proper location of your timing belt, even...
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