WRX/STI 2015-2021 Performance Parts
Shop 2015–2021 Subaru WRX and STI performance parts including exhaust, suspension, intakes, turbo upgrades, and tuning solutions.
Shop by Vehicle
-
Up to 19% offVendor:Air LiftAir Lift Replacement Air Spring Sleeve Type
Only 12 leftRegular price $283.99Sale price $283.99 Regular priceUnit price per$348.99You Save $65.00! -
Up to 10% offVendor:StoptechStopTech 05-10 Subaru Impreza WRX/STi Slotted & Drilled Right Front Rotor
Only 13 leftRegular price $240.81Sale price $240.81 Regular priceUnit price per$267.57You Save $26.76! -
Up to 10% offVendor:StoptechStopTech 08+ Subaru STI (Will Not Fit 05-07) Slotted & Drilled Sport Brake Rotor
Regular price $236.75Sale price $236.75 Regular priceUnit price per$263.06You Save $26.31! -
Up to 10% offVendor:StoptechStopTech 08+ Subaru STI (Will Not Fit 05-07) Slotted & Drilled Sport Brake Rotor
Only 11 leftRegular price $236.75Sale price $236.75 Regular priceUnit price per$263.06You Save $26.31! -
Vendor:IAG PerformanceIAG Air / Oil Separator (AOS) For 2008-14 Subaru WRX & 2008-21 STI
Regular price $499.99Sale price $499.99 Regular priceUnit price per$499.99 -
Vendor:COBBCobb Subaru Fuel Pressure Regulator Manifold Reference Relocation Kit
Only 1 leftRegular price $25.00Sale price $25.00 Regular priceUnit price per -
Up to 17% offVendor:Hawk PerformanceHAWK Talon Rotors
Only 7 leftRegular price $544.88Sale price $544.88 Regular priceUnit price per$654.98You Save $110.10! -
Up to 17% offVendor:Hawk PerformanceHAWK Talon Rotors
Only 6 leftRegular price $550.28Sale price $550.28 Regular priceUnit price per$660.98You Save $110.70! -
Up to 17% offVendor:Hawk PerformanceHAWK Talon Rotors
Only 2 leftRegular price $472.18Sale price $472.18 Regular priceUnit price per$570.98You Save $98.80! -
Up to 17% offVendor:Hawk PerformanceHAWK Talon Rotors
Only 4 leftRegular price $473.98Sale price $473.98 Regular priceUnit price per$572.98You Save $99.00! -
Vendor:WeatherTechWT FloorLiner - Front - Blk
Only 6 leftRegular price $210.90Sale price $210.90 Regular priceUnit price per -
Up to 33% offVendor:BilsteinBilstein B6 2015-2017 Subaru WRX - STI Rear Monotube Strut Assembly
Only 1 leftRegular price $156.00Sale price $156.00 Regular priceUnit price per$232.00You Save $76.00! -
Up to 33% offVendor:BilsteinBilstein B8 2015-2017 Subaru WRX - STI Rear Monotube Shock Absorber
Only 2 leftRegular price $166.00Sale price $166.00 Regular priceUnit price per$247.00You Save $81.00! -
Up to 33% offVendor:BilsteinBilstein B6 2015-2017 Subaru WRX - STI Front Left Monotube Strut Assembly
Only 5 leftRegular price $329.00Sale price $329.00 Regular priceUnit price per$489.00You Save $160.00! -
Up to 33% offVendor:BilsteinBilstein B8 2015-2017 Subaru WRX - STI Front Left Monotube Strut Assembly
Only 16 leftRegular price $335.00Sale price $335.00 Regular priceUnit price per$498.00You Save $163.00!
Why Buy from FAST of West Chester?
This isn’t a warehouse — it’s a performance shop. At FAST of West Chester, every part we sell has been installed, tested, and pushed on real builds.
Led by Dave Brown, our team knows what works, what doesn’t, and what actually delivers results. No guesswork. No wasted money. Just proven performance.
Unlike large online retailers, our recommendations are based on hands-on experience with Subaru, JDM, and performance platforms — ensuring every part we offer delivers reliable performance, fitment, and results.