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Aftermarket Performance Parts for the Sti
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AEM Water-Methanol Injection kit
The AEM Water Injection Kit is a safe and economical way to reduce air
inlet temperatures to increase boost pressure for more power.
Lower air inlet temperatures allow users to advance timing without having to
run higher-octane fuel. This is the most ...
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Agency Alternator Cover - WRX STi 08-09
This cover helps dress up the engine bay with some needed style in Satin Silver or Wrinkle Red.
TECH TIP: The cover includes riser spacers and fits with the factory bolt locations. All other hardware is provided for a quick and easy installa...
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Agency Power Fuel Rail Kit - Subaru STI 07-09
The factory system runs the fuel in series which tends to cause certain cylinders to obtain less fuel. In higher boost applications, these cylinders can lean out dangerously causing the motor to fail.
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Agency Power Intake Manifold Gasket - STi 04+
Innovation and engineering has brought Agency Power to release their all
new Intake Manifold Temperature Reducer Gasket. This gasket goes under
your intake manifold to be spaced further out between the engine which
reduces intake temperatures by 50-60 degrees Fahrenheit. By spacing the
...
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Agency Short Ram Intake Kit - Subaru STi 08-10
This intake kit gained approximately 10 horsepower and ft/lbs of
torque. At the peak horsepower point of 5000 rpm's, the intake kit made
almost 20 wheel horsepower.
The kit features a CNC aluminum MAF sensor mount on our intake tube with built in fins to keep air flow laminar. Th...
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AMS Fuel Pressure Regulator Kit - STi 08+
The AMS 08+ Subaru STI Fuel Pressure Regulator Kit is designed for anyone running an upgraded fuel pump and or fuel injectors. Whether you are running too rich and need to back off the fuel pressure or if you are running too lean on your current injectors and need to raise base fuel pressure, thi...
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AMS Small Battery Kit - STi 08+
The AMS 08+ WRX/STI Small Battery Kit replaces your heavy factory battery with a lightweight race battery. This kit significantly reduces weight and frees up space. Our high quality components guarantee long life and the battery itself will have no trouble starting your vehicle in harsh condit...
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AMS Small Battery Tray - STi 08+
The AMS 08+ STI/WRX Small Battery Tray allows you to replace the heavy factory battery and mount with a lightweight race battery mounted on its side. The tray is TIG welded by hand using high grade aluminum and the battery is topped off with a CNC'd AMS tie down plate. All factory mounting ...
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AQ Motorsports 04+ Subaru Oil Cooler
With a 16 row oil cooler (over 1 ft long) with ultra-high quality lines and fittings, the AQ Motorsports oil cooler is the perfect upgrade for the aggressive street car or track day warrior.
Subaru's run extremely hot at the track or with sustained aggressive driving. The stock oil...
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Bosch 044 Fuel Pump
The Bosch 044 fuel pump provides 300LPH of flow and operates at an amazing 72.5PSI.
Bosch 044 fuel pumps are comparable to the Walbro 255LPH high pressure
inline fuel pumps which can both support vehicles for up to 600-700
horse power.
Can be used in sequ...
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Brian Crower Stage 2 Set of 4 Cams - STi 08-10
Brian Crower high performance billet camshafts are CAD designed to optimize torque & horsepower throughout the power band.
Duration: 272/272
Duration @.050: 220/220
Lift: .400” /.400”
TECH TIP: Plug and pl...
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Brian Crower Stage 3 Set of 4 Cams - STi 08-10
Brian Crower high performance billet camshafts are CAD designed to optimize torque & horsepower throughout the power band.
Duration: 280/280
Duration @.050: 234/234
Lift: .425” /.425”
Fits: Subaru STi...
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CNT Racing 340LPH Fuel Pump w/Kit - STi 2004-2010
CNT Racing fuel pumps are a direct install replacement for the stock
fuel pump. Each fuel pump includes an installation kit with the hardware
required for a professional or do it yourself installation.
Please note that these fuel pumps may be smaller that your stock fuel
...
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CNT Racing Aluminum Radiator - STi 08-11
Features
Racing Radiator
Direct bolt-on design requires no modification for fitment to manual transmission models
Perfect upgrade to increase engine performance and cooling efficiency
Made of lightweight aluminum
Hand welded
Tube and fin design provides r...
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Cobb Tuning AccessPort: Subaru Impreza STi 2008-2010
The ultimate personal tuning solution for your 2008-2010 STi!
Reprogram your vehicle's computer (ECU) by selecting one of the pre-installed performance "maps" that automatically optimize settings such as the air/fuel ratio, ignition timing, boost and more for performance r...
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Cosworth Camshaft set, 2008+ Subaru STI - STi 08-09
Cosworth has been engineering camshafts for nearly 50 years. That coupled with years of innovative multi valve cylinder head design ensures our camshaft designs are the most efficient in providing maximum usable power across the widest power band.
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CP Piston & Ring Set 100mm Bore Size 0.5mm - STi 04-08
CP Pistons has specially designed high-performance pistons off-the-shelf. In most cases, these will directly replace the stock pistons.
*Features*
* High strength aluminum forgings
* Super lightweight designs
* Fully CNC machined and bala...
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CP Piston & Ring Set 99.5mm Bore Standard Size - STi 04-08
CP Pistons has specially designed high-performance pistons off-the-shelf. In most cases, these will directly replace the stock pistons.
*Features*
* High strength aluminum forgings
* Super lightweight designs
* Fully CNC machined and balanced to +/- ...
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CP Piston & Ring Set 99.5mm Bore Standard Size - STi 04-11
CP Pistons has specially designed high-performance pistons
off-the-shelf. In most cases, these will directly replace the stock
pistons.
*Features*
* High strength aluminum forgings
* Super lightweight designs
* Fully CNC machined and ...
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CP Piston & Ring Set 99.75mm Bore Size +0.25mm - STi 04-11
CP Pistons has specially designed high-performance pistons
off-the-shelf. In most cases, these will directly replace the stock
pistons.
*Features*
* High strength aluminum forgings
* Super lightweight designs
* Fully CNC machined and ...
Our Price: $621.81
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CP Piston & Ring Set 99.75mm Bore Size 0.25mm - STi 04-08
CP Pistons has specially designed high-performance pistons off-the-shelf. In most cases, these will directly replace the stock pistons.
*Features*
* High strength aluminum forgings
* Super lightweight designs
* Fully CNC machined and balanced to +/- ...
Our Price: $621.81
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CP Piston Ring Only for SC7420 Pistons - STi 04-08
CP Pistons Piston Rings are produced to give our customers the best possible ring seal and minimize blow-by. Purchased in bulk from the finest manufacturers in the world and packaged in combinations for your application. These sets deliver reliable and dependable performance
...
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CP Piston Ring Only for SC7421 Pistons - STi 04-08
CP Pistons Piston Rings are produced to give our customers the best possible ring seal and minimize blow-by. Purchased in bulk from the finest manufacturers in the world and packaged in combinations for your application.
Bore:
...
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CP Piston Ring Only for SC7422 Pistons - STi 04-08
CP Pistons Piston Rings are produced to give our customers the best
possible ring seal and minimize blow-by. Purchased in bulk from the
finest manufacturers in the world and packaged in combinations for your
application.
Our Price: $35.00
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Crawford Air / Oil Seperator - STi 08+ w/Top Mount IC
Drawing on our 35 years of racing knowledge, the Crawford Performance Closed Loop Air/Oil Separator was engineered and designed to keep the motor oil where it belongs – inside the motor and out of the intake system.
Our Price: $384.95
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Crawford High Flow Water Pump - STi 2008+
Crawford Performance high flow water pumps provide maximum cooling efficiency for the street or track vehicle. Incorporating a sealed cast impeller design to efficiently pump more water through the engine at higher velocities and pressures allows the engine to be cooled more effectively especiall...
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Crawford High Performance Water Tank - STI 2008+
The Crawford High Performance / High Pressure Coolant Tank is designed specifically for road or track applications. Not only was this unit tested for day to day use on our shop test mule for nearly a year in cold, hot and varying altitudes it has also been tested on multiple race applications, fr...
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DeatschWerks 1000cc WRX/07+ STi Fuel Injectors
These are the same injectors demanded by many of the most discriminating Subaru tuners including Cobb.
Prices are for a flow balanced set of 4 injectors
Each set is individually tested and flow ...
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DeatschWerks 650cc Fuel Injectors - STi 07+
These are the same injectors demanded by many of the most discriminating Subaru tuners including Cobb.
Prices are for a flow balanced set of 4 injectors
Each set is individually tested and flow ...
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DeatschWerks 750cc 07 STi Fuel Injectors
These are the same injectors demanded by many of the most discriminating Subaru tuners including Cobb.
Prices are for a flow balanced set of 4 injectors
Each set is individually tested and flow ...
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DeatschWerks 850cc 07 STi Fuel Injectors
These are the same injectors demanded by many of the most discriminating Subaru tuners including Cobb.
Prices are for a flow balanced set of 4 injectors
Each set is individually tested and flo...
Our Price: $556.77
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Dress Up Bolts Titanium Engine Bay Kit - Subaru WRX/STi 2008-2010
Take pride in your engine bay or engine? It’s time to take it to the next level with a Titanium Series Dress Up Kit for your engine bay and engine! These kits are a complete replacement for most visible bolts and nuts on your specific vehicle’s engine bay, ready to bolt in as soon as they arrive....
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FIC 1100cc High Z Fuel Injectors - STi 04+
Subaru WRX Injector Set *(Fits STi with fuel rail conversion)
4x1100cc Saturated / High Impedance Ball & Seat Injectors. (20% larger than 1000cc Bosch EV14 injectors.) Includes pigtails PGTJETR4 or add P&Play adaptors PADPJtoD4.
Our Price: $495.00
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FIC 2150cc BlueMAX Fuel Injectors - STi 04+
Subaru WRX BlueMAX Injector Set *(Fits STi with fuel rail conversion)
4 x 2150cc Saturated / High Impedance Ball & Seat Injectors. Largest high impedance injector ever! Great linearity and idle will work at elevated fuel pressure. Best injector for E85 applications! These injec...
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FIC 775cc High Z Fuel Injectors - STi 04+
Subaru WRX Injector Set *(Fits STi with fuel rail conversion)
4x775cc Super FAST Lightweight EV14 Custom Modified Saturated/High Impedance Ball & Seat Injectors. Includes pigtails PGT USC4 or add P&Play adaptors PADPUtoD5.
Our Price: $360.00
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FIC 900cc High Z Fuel Injectors - STi 04+
Subaru WRX Injector Set *(Fits STi with fuel rail conversion)
4x900cc (Same as 1000cc by others) Super FAST Lightweight EV14 Custom Modified Saturated/High Impedance Ball & Seat Injectors. Includes pigtails PGT USC4 or add P&Play adaptors PADPUtoD6.
Our Price: $409.00
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Gates Racing Performance Micro-V Belt - STi 08+
If you want something done right, you have to invent it yourself. That's
what was done with Gates Racing Micro-V Belts. You get more than just a
cool color. You get high performance, leading edge technology that's
300% stronger with three times the heat resistance of stock belts.
<...
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Grimmspeed Lightweight Crank Pulley - Sti 2004+
The OEM Subaru crank pulley has been a cause for concern ever since its original design. It is extremely heavy, susceptible to catastrophic failure, and quite unsightly. Continuing to use this on our cars just wouldn't do. Eliminating rotational mass while maintaining a safe presence can increase...
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Grimmspeed Machined Oil Cap - STi 2004+
GrimmSpeed has just released a new Machined Oil Cap for Subaru. This is one of the cheapest and
most common modifications out there. Nothing is better than an easy to install, inexpensive, and
sharp looking product that requires little to no customer support. The GrimmSpeed oil cap ...
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stiperformanceparts.com is not a subaru authorized sti parts dealer or repair facility. stiperformanceparts.com is not affiliated, related to, or endorsed by Subaru of America or Fuji Heavy Industries LTD in any way. stiperformanceparts.com is an independent retailer of performance parts and accessories that is not affiliated with Subaru of America (Fuji Heavy Industries LTD). Use of trademarks is done on a fair use basis and without intent to compete with, or take advantage of Subaru or its trademarks. For more information on Subaru please visit http://www.subaru.com
