Most COMPLETE and COMPACT Air/Oil Separator on the market! An Air/Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system. The GrimmSpeed AOS is unique as it allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Their AOS will allow your engine to run more efficiently due to the separation of oil from the intake system. When there is oil in your system, the result is 1) reduced fuel octane 2) higher chance of engine knock(detonation) 3) worse emissions 4) higher oil consumption. Their AOS will solve all of these problems.

Pressing Subaru brakes leaves a lot to be desired, especially when every inch counts in a race or when you are depending on them to save your life! The nasty firewall flex is the source of this performance flaw in Subarus, this is the problem that we have come to solve. GrimmSpeed has engineered the most simple to install and best performing master cylinder brace on the market.

Improve pedal feel and braking capabilities with the Grimmspeed Master Cylinder Brace. Pedal feel is dramatically improved very similar to the feeling of adding SS braided brake lines. This brace features: Large diameter pressure cup that will not mar and damage the master cylinder like other braces, the most bracket mounting points available on the market (5 strut tower mounting points), indestructible 12L14 CNC Laser cut construction and black powder coating, the only brace to not require any cutting or modification of stock components. Uses simple allen key locking mechanism. Fits 08+ Impreza/WRX/STi and 08-09 LGT (This includes the base model, WRX, and STI)

GS knew when it came time to design this product they didn't want to just create another heat shield to add to the mix, but create another level of product. The basic heat shield would not cut it, GS wanted every fitment of turbo, downpipe, and up pipe combination GS could work into one design. GS measured, cut, bent, welded, riveted, and after many tested prototypes GS arrived at a heatshield they are extremely proud of. Other heatshields had problems with cracking, poor fitment, or poor heat coverage but GS would not settle for this! So here it is, elegantly simple in style, but painstakingly engineered in design. It's what you can expect from GrimmSpeed™

License plates are a necessary evil on the front of our cars, but you can save your front bumper from looking boring or blocking flow to your FMIC with the GrimmSpeed License Plate Relocation Kit. Utilizing a unique Infinite-Adjust design allows for virtually any mounting position and angular adjustment so you can mount it where you want it! The simple design mounts in the OEM tow hook location for maximum support while providing you with the largest range of adjustment available on the market.

Injector Dynamics 1000cc/min Top Feed Subaru Fuel Injector Set. Fits 2002-11 Subaru WRX, 2007-11 STi, 07-11 Legacy GT. Includes Clips and pins that require crimping.

Killer B Motorsport Black Delrin Type-R Brushed Shift Knob for 6 Speed Manual Transmission

Subaru OEM 2.5L 2004-2011 STI Short Block

Techna-Fit stainless steel braided clutch line kit for 2006-07 Subaru WRX. Color Charcoal.

FHI Head Bolt Set For 2002-09 Subaru WRX / STI / FXT / LGT (12 Total complete set). Fits 2.0L and 2.5L engines. Bolts available separately (Call).

Manley Extreme Duty 32mm Exhaust Valve Set WRX / STI (8) . Manley valves are made from an ExtremeAlloy XH-426 Stainless. The valves feature swirl polishing, are fully machined with chrome stems and hard tips.

Manley Race Flo 36mm Intake Valve Set For Subaru WRX / STI (8). Manley Intake valves are made from NK-842 Stainless, are Swirl Polished, Fully Machined, feature Chrome Stems and Hard Tips.

Manley Extreme Duty 33mm Exhaust Valve Set WRX / STI (8) . Manley valves are made from an ExtremeAlloy XH-426 Stainless. The valves feature swirl polishing, are fully machined with chrome stems and hard tips.

Manley Race Flo 376mm Intake Valve Set For Subaru WRX / STI (8). Manley Intake valves are made from NK-842 Stainless, are Swirl Polished, Fully Machined, feature Chrome Stems and Hard Tips.

The Aeromotive 340 Stealth Fuel Pump is a high-output, in-tank, electric fuel pump that fits most popular EFI applications. The Aeromotive 340 is a compact, lightweight pump that bolts into many existing hanger assemblies.