2015 Subaru Wrx-sti Engine Upgrades

    WRX STI Upgrades by WRX STI Experts.

    Shop 2015 Subaru Wrx-sti Engine Upgrades by Category

    Exhausts image

    Exhausts

    Cat Back Exhaust System

    Exhaust Gaskets and Hardware

    Axle Back Exhausts

    Exhaust Headers and Manifolds

    Heat Isolation and Heat Wrap

    Shop All

    Motor Builds image

    Motor Builds

    Engine Hardware and Fittings

    Short Blocks

    Cams

    Pulleys

    Timing Belts

    Shop All

    Engine Dress Up image

    Engine Dress Up

    Oil Caps

    Dress Up Caps

    Radiator Shrouds

    Alternator Covers

    Battery Tie Downs and Trays

    Shop All

    Cooling image

    Cooling

    Intercoolers

    Intercooler Hose Kits

    Radiators

    Overflow and Expansion Tanks

    Fluid Coolers

    Shop All

    Air Induction image

    Air Induction

    Turbo Inlet Hoses and Pipes

    Cold Air Intakes

    Air Intake Filter Replacements

    Intake Manifolds

    Air Intake and MAF Hoses

    Shop All

    Fuel System image

    Fuel System

    Fuel Injectors

    Fuel Rails

    Fuel Lines and Fittings

    Fuel Pumps

    Flex Fuel

    Shop All

    Oil Systems image

    Oil Systems

    Air Oil Separators

    Oil Pans

    Oil Control Devices

    Catch Cans

    Oil Pumps

    Shop All

    Turbochargers and Superchargers image

    Turbochargers and Superchargers

    Blow Off Valves

    Turbos

    Wastegates

    Blow Off Valve Recirculation Kits

    Boost Control Solenoids

    Shop All

    Engine Management image

    Engine Management

    Plug and Play Engine Management

    Shop All

    Ignition Systems image

    Ignition Systems

    Spark Plugs

    Shop All

    Shop 2015 Subaru Wrx-sti featured products

    710 Results

    GrimmSpeed Stock Downpipe to 3inch Exhaust Adapter - Subaru Models (inc. 2004-2021 Subaru STI / 2002-2021 WRX)

    50 In Stock

    077046

    GrimmSpeed Stock Downpipe to 3inch Exhaust Adapter - Subaru Models (inc. 2004-2021 Subaru STI / 2002-2021 WRX)

    4.9(9)
    $60.00
    CSF 2-Row Time Attack Professional Race Spec Aluminum Radiator with Black finish - 2008-2021 Subaru WRX / STI / 2009-2013 Forester

    7095-B

    CSF 2-Row Time Attack Professional Race Spec Aluminum Radiator with Black finish - 2008-2021 Subaru WRX / STI / 2009-2013 Forester

    5.0(1)
    $330.55
    PERRIN Oil Cap (Blue) - Subaru Models (Inc. 2002-2024 WRX / 2004-2021 STI / 1998-2024 Forester / 2013-2024 BRZ)

    PSP-ENG-711BL

    PERRIN Oil Cap (Blue) - Subaru Models (Inc. 2002-2024 WRX / 2004-2021 STI / 1998-2024 Forester / 2013-2024 BRZ)

    $69.70
    GrimmSpeed OVERTAKE BB500 Turbocharger Kit - 2002-2014 Subaru WRX / 2004-2021 STI / 2005-2009 Legacy GT / Outback XT

    50 In Stock

    123006

    GrimmSpeed OVERTAKE BB500 Turbocharger Kit - 2002-2014 Subaru WRX / 2004-2021 STI / 2005-2009 Legacy GT / Outback XT

    5.0(1)
    $1,999.00
    PERRIN Panel Air Filter - 2008-2021 Subaru WRX / 2008-2018 STI / 2009-2014 Forester / 2005-2009 Legacy GT

    1 In Stock

    PSP-INT-110

    PERRIN Panel Air Filter - 2008-2021 Subaru WRX / 2008-2018 STI / 2009-2014 Forester / 2005-2009 Legacy GT

    $61.20
    Torque Solution Cylinder 4 Coolant Mod - 2002-2014 Subaru WRX / 2004-2021 Subaru STI

    18 In Stock

    TS-SU-585

    Torque Solution Cylinder 4 Coolant Mod - 2002-2014 Subaru WRX / 2004-2021 Subaru STI

    5.0(1)
    $84.99
    aFe Power Panel Air Filter (dry) - 2015-2024 Subaru WRX / 2015-2021 STI / 2014-2021 Forester

    3 In Stock

    31-10161

    aFe Power Panel Air Filter (dry) - 2015-2024 Subaru WRX / 2015-2021 STI / 2014-2021 Forester

    5.0(2)
    $76.00
    Invidia R400 Gemini Single Layer Cat Back Exhaust - Titanium Burnt Tips - 2015-2021 Subaru WRX / STI

    40 In Stock

    HS15STIGM4ST

    Invidia R400 Gemini Single Layer Cat Back Exhaust - Titanium Burnt Tips - 2015-2021 Subaru WRX / STI

    5.0(2)
    $1,419.22
    Injector Dynamics Fuel Injectors 1300cc - 2015-2021 Subaru STI / 2006-2008 Forester / 2002-2014 Impreza

    18 In Stock

    1300.48.11.WRX.4

    Injector Dynamics Fuel Injectors 1300cc - 2015-2021 Subaru STI / 2006-2008 Forester / 2002-2014 Impreza

    $945.00
    GSC Power-Division Viton Valve Stem Seals - Subaru EJ Turbo Models (inc. 2002-2014 WRX / 2004-2021 STI)

    72 In Stock

    1022

    GSC Power-Division Viton Valve Stem Seals - Subaru EJ Turbo Models (inc. 2002-2014 WRX / 2004-2021 STI)

    $16.75
    GrimmSpeed Turbo to Downpipe Gasket - 2015-2021 Subaru STI / 2004-2013 Forester / 2002-2014 Impreza

    50 In Stock

    028001

    GrimmSpeed Turbo to Downpipe Gasket - 2015-2021 Subaru STI / 2004-2013 Forester / 2002-2014 Impreza

    4.5(2)
    $20.00
    Boomba Racing Radiator Reservoir Cover Cap (Natural) - 2015-2021 Subaru WRX / STI

    031020110000

    Boomba Racing Radiator Reservoir Cover Cap (Natural) - 2015-2021 Subaru WRX / STI

    $61.75
    GFB Mach 2 TMS Recirculating Diverter Valve - 2015-2021 Subaru STI / 2006-2008 Forester XT / 2002-2014 Impreza

    4 In Stock

    T9103

    GFB Mach 2 TMS Recirculating Diverter Valve - 2015-2021 Subaru STI / 2006-2008 Forester XT / 2002-2014 Impreza

    $190.80
    Cusco Intercooler Protection Net - 2015-2021 Subaru STI / 2008-2014 Impreza

    6A1035A

    Cusco Intercooler Protection Net - 2015-2021 Subaru STI / 2008-2014 Impreza

    $147.50
    GSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers - 2002-2014 Subaru WRX / 2004-2021 STI

    5043

    GSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers - 2002-2014 Subaru WRX / 2004-2021 STI

    $399.92
    Killer B Motorsport 4-1 Holy Header DIY Rotated - 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester XT

    HH-DIY

    Killer B Motorsport 4-1 Holy Header DIY Rotated - 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester XT

    $1,756.00
    IAG Performance Unequal Length Header With Uppipe - 2002-2014 Subaru WRX / 2004-2021 STI

    IAG-EXT-1000

    IAG Performance Unequal Length Header With Uppipe - 2002-2014 Subaru WRX / 2004-2021 STI

    $849.99
    IAG Performance V2 Competition Series EJ Timing Belt Tensioner - 2015-2021 Subaru STI

    IAG-ENG-5111BK

    IAG Performance V2 Competition Series EJ Timing Belt Tensioner - 2015-2021 Subaru STI

    $589.99
    Cusco HD Exhaust Hangers (Blue) - 2015-2021 Subaru WRX / STI / 2008-2014 Impreza / 2013-2016 Scion FR-S / 2013-2020 Subaru BRZ / 2017-2019 Toyota 86

    A160RM002B

    Cusco HD Exhaust Hangers (Blue) - 2015-2021 Subaru WRX / STI / 2008-2014 Impreza / 2013-2016 Scion FR-S / 2013-2020 Subaru BRZ / 2017-2019 Toyota 86

    5.0(1)
    $10.80
    Verus Engineering Oil Cap, Anodized Black - 2012-2024 Subaru WRX / 2013-2021 STI / 2013-2024 Toyota GR86 / Subaru BRZ / Scion FRS / 2014-2024 Forester / 20-2024 Crosstrek / 2015-2024 Impreza

    1 In Stock

    A0310A-BLK

    Verus Engineering Oil Cap, Anodized Black - 2012-2024 Subaru WRX / 2013-2021 STI / 2013-2024 Toyota GR86 / Subaru BRZ / Scion FRS / 2014-2024 Forester / 20-2024 Crosstrek / 2015-2024 Impreza

    $55.40

    Page 1 of 36

    110% Price Match Guarantee*

    Find the same product for less on any competitor's site, and we'll match that price and beat if by 10% of the difference!* 

    Free Shipping*

    Free shipping is available within the lower 48 states for orders totalling $199 or more. Simply select the free shipping option during checkout.
    *Exclusions apply

    30 Day, 100% Satisfaction

    SubiSpeed Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.