Skip to content
Katapult Buy now, pay later. No credit required!
Katapult Buy now, pay later. No credit required!
About Military Discounts Contact Shipping

2015-2021 STI Engine

Filters

  • Perrin_Battery_Tie_Down_black
    Perrin_Battery_Tie_Down_set
    Save up to 15% Save %
    $77.00 - $84.00
    $77.00 - $84.00
    $77.00
    $67.15 - $75.60
    $67.15 - $75.60
    $67.15

    Perrin Battery Tie Down 2002-2022 wrx performance WRX / 2004-2021 STI / 2013+ BRZ/FRS/86

    Perrin Performance
    In stock

    Secure your battery in style with the Perrin Battery Tie Down for 2002-2022 WRX, 2004-2021 STI, and 2013+ BRZ/FRS/86. Crafted for performance. DETA...

    View full details
    $77.00 - $84.00
    $77.00 - $84.00
    $77.00
    $67.15 - $75.60
    $67.15 - $75.60
    $67.15
    Save up to 15% Save %
  • Perrin_Pitch_Stop_Mount_2002-2022_WRX/2004-2021_STI_black
    Perrin_Pitch_Stop_Mount_2002-2022_WRX/2004-2021_STI_all_multicolor
    Save up to 15% Save %
    $117.00
    $117.00 - $117.00
    $117.00
    $99.45 - $105.30
    $99.45 - $105.30
    $99.45

    Perrin Pitch Stop Mount 2002-2022 WRX / 2004-2021 STI

    Perrin Performance
    In stock

    Reduce drivetrain shudder under hard acceleration by installing a PERRIN Pitch Stop Mount. Subarus with power and drivetrain upgrades will need PER...

    View full details
    $117.00
    $117.00 - $117.00
    $117.00
    $99.45 - $105.30
    $99.45 - $105.30
    $99.45
    Save up to 15% Save %
  • $21.00 - $21.00
    $21.00
    $21.00 - $21.00
    $21.00

    Turbo XS Subaru EJ20/EJ25 5 Layer SS Turbine Outlet Gasket

    Turbo XS
    In stock

    The Turbo XS Subaru EJ20/EJ25 5 Layer SS Turbine Outlet Gasket is designed for single scroll turbo applications. Its five-layer construction ensure...

    View full details
    $21.00 - $21.00
    $21.00
    $21.00 - $21.00
    $21.00
  • Killer_B_Motorsport_Aluminum_Oil_Pan_Package
    Save 20% Save %
    $619.00
    $619.00 - $619.00
    $619.00
    $495.20
    $495.20 - $495.20
    $495.20

    Killer B Motorsport Aluminum Oil Pan Package 2002-2014 WRX / 2004-2021 STI

    Killer B Motorsport
    In stock

    Our V2 Performance Oil pan is designed to reliably meet the demands of high performance Subaru Engines used on street or track applications. Oil Pa...

    View full details
    $619.00
    $619.00 - $619.00
    $619.00
    $495.20
    $495.20 - $495.20
    $495.20
    Save 20% Save %
  • Save 40% Save %
    $73.23
    $73.23 - $73.23
    $73.23
    $43.80
    $43.80 - $43.80
    $43.80

    NGK Iridium Spark Plug Set One Step Colder 2006-2014 WRX / 2004-2021 STI / 2005-2009 LGT / 2004-2008 FXT

    NGK
    In stock

    This NGK Iridium spark plug set is specifically designed to provide extra performance for 2006-2014 WRX, 2004-2021 STI, 2005-2009 LGT, and 2004-200...

    View full details
    $73.23
    $73.23 - $73.23
    $73.23
    $43.80
    $43.80 - $43.80
    $43.80
    Save 40% Save %
  • Injector_Dynamics_Fuel_Injectors_1300cc_2002-2014_WRX/2007-2021_STI
    $945.00 - $945.00
    $945.00
    $945.00 - $945.00
    $945.00

    Injector Dynamics Fuel Injectors 1300cc 2002-2014 WRX / 2007-2021 STI

    Injector Dynamics
    In stock

    These are the Injector Dynamics 1300X Fuel Injectors and are an excellent option for those of you who need to supplement your fuel system in your ...

    View full details
    $945.00 - $945.00
    $945.00
    $945.00 - $945.00
    $945.00
  • $129.00 - $129.00
    $129.00
    $129.00 - $129.00
    $129.00

    GrimmSpeed 08+ STi Boost Control Solenoid

    GrimmSpeed
    In stock

    GrimmSpeed 08+ STi Boost Control Solenoid

    $129.00 - $129.00
    $129.00
    $129.00 - $129.00
    $129.00
  • Aeromotive_Top_Feed_Fuel_Rail _System_stainless
    $1,299.95 - $1,299.95
    $1,299.95
    $1,299.95 - $1,299.95
    $1,299.95

    Aeromotive Top Feed Fuel Rail System 2002-2014 WRX / 2007-2021 Sabaru STI parts

    Aeromotive
    In stock

    The Aeromotive Top Feed Fuel Rail System includes a complete parallel setup that includes fuel rails, braided Sabaru STI parts stainless lines and ...

    View full details
    $1,299.95 - $1,299.95
    $1,299.95
    $1,299.95 - $1,299.95
    $1,299.95
  • killer-b-oil-fill-relocation-tube_o_ring
    killer-b-oil-fill-relocation-tube_o_ring_black
    Save 10% Save %
    $179.00
    $179.00 - $179.00
    $179.00
    $161.10
    $161.10 - $161.10
    $161.10

    Killer B Oil Fill Relocation Tube 2008-2014 WRX / 2008-2021 STI

    Killer B Motorsport
    In stock

    The Killer B Motorsport Relocated Oil Fill Tube changes the location of the oil fill tube and cap. This product was designed from customer requests...

    View full details
    $179.00
    $179.00 - $179.00
    $179.00
    $161.10
    $161.10 - $161.10
    $161.10
    Save 10% Save %
  • Perrin_Radiator_Shroud_black
    Perrin_Radiator_Shroud
    Save up to 15% Save %
    $150.00 - $170.00
    $150.00 - $170.00
    $150.00
    $127.50 - $153.00
    $127.50 - $153.00
    $127.50

    Perrin Radiator Shroud 2015-2021 WRX / STI

    Perrin Performance
    In stock

    The PERRIN Radiator Shroud caps the top of the radiator for a sleek, clean, and accented new look. DETAILS: LET YOUR RADIATOR LOOK HOT WHILE GETT...

    View full details
    $150.00 - $170.00
    $150.00 - $170.00
    $150.00
    $127.50 - $153.00
    $127.50 - $153.00
    $127.50
    Save up to 15% Save %
  • Save 7% Save %
    $85.00
    $85.00 - $85.00
    $85.00
    $79.00
    $79.00 - $79.00
    $79.00

    GetaDomTune Cylinder 4 Chamber Cooling System w/ Stainless T Fitting - Subaru 2004+ STI / 2002-2014 WRX)

    GetaDomTune
    In stock

    GetaDomTune Cylinder 4 Chamber Cooling System. This is an industry first and patent pending DOHC EJ Cylinder 4 Combustion Chamber Cooling Kit. Thi...

    View full details
    $85.00
    $85.00 - $85.00
    $85.00
    $79.00
    $79.00 - $79.00
    $79.00
    Save 7% Save %
  • Perrin_Front_Strut_Tower_Brace_left_right_Mounting_foot_black
    Perrin_Front_Strut_Tower_Brace_left_right_Mounting_foot
    Save up to 15% Save %
    $299.00 - $310.00
    $299.00 - $310.00
    $299.00
    $263.50 - $279.00
    $263.50 - $279.00
    $263.50

    Perrin Front Strut Tower Brace 2008-2021 WRX / STI

    Perrin Performance
    In stock

    The ultra-strong PERRIN Strut Tower Brace eliminates strut tower flex and is an excellent accent piece for your engine bay. DETAILS: PERFORMANCE ...

    View full details
    $299.00 - $310.00
    $299.00 - $310.00
    $299.00
    $263.50 - $279.00
    $263.50 - $279.00
    $263.50
    Save up to 15% Save %
  • $314.00 - $314.00
    $314.00
    $314.00 - $314.00
    $314.00

    Nameless Performance Bypass Valve 2002-2007 WRX / 2004-2021 STI / 2006-2008 FXT

    Nameless Performance
    In stock

    The Nameless Performance Bypass Valve 2002-2007 WRX / 2004-2021 STI / 2006-2008 FXT is a high-performance valve designed to reduce compressor surge...

    View full details
    $314.00 - $314.00
    $314.00
    $314.00 - $314.00
    $314.00
  • $99.00 - $99.00
    $99.00
    $99.00 - $99.00
    $99.00

    Grimmspeed Hood Struts High Lift - Subaru 2015-2023 WRX / 2015-2021 STI

    GrimmSpeed
    In stock

    Opens Hood 30% Farther Than OEM - Better access and light for working Perfect Hood Balance - Struts are optimized for VA/VB hood size and weigh...

    View full details
    $99.00 - $99.00
    $99.00
    $99.00 - $99.00
    $99.00
  • Sold out
    $229.00
    $229.00 - $229.00
    $229.00
    $183.20
    $183.20 - $183.20
    $183.20

    Killer B Performance Subaru EJ25 High Flow Ultimate Oil Pickup Baffle Combo

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    The Killer B Motorsport High Flow Ultimate Oil PickupDesigned to replace the failure prone and performance limited OEM oil pickup. This is the high...

    View full details
    $229.00
    $229.00 - $229.00
    $229.00
    $183.20
    $183.20 - $183.20
    $183.20
    Sold out
  • Sold out
    $19.00
    $19.00 - $19.00
    $19.00
    $17.10
    $17.10 - $17.10
    $17.10

    Killer B Oil Temperature Sensor Adapter 1/2NPT to 1/8PT

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    Our 1/2NPT to 1/8PT Adapter will allow the use of aftermarket temperature sensors that have 1/8PT threads. Our aftermarket oil pan includes an extr...

    View full details
    $19.00
    $19.00 - $19.00
    $19.00
    $17.10
    $17.10 - $17.10
    $17.10
    Sold out
  • Sold out
    $29.00
    $29.00 - $29.00
    $29.00
    $26.10
    $26.10 - $26.10
    $26.10

    Killer B Fumoto Valve 1/2NPT for use w/ Killer B Oil Pans

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    These handy valves make short work of oil changes, putting you IN the car longer and under it less. No more sockets, wrenches, crush washers, or to...

    View full details
    $29.00
    $29.00 - $29.00
    $29.00
    $26.10
    $26.10 - $26.10
    $26.10
    Sold out
  • Save 10% Save %
    $45.00
    $45.00 - $45.00
    $45.00
    $40.50
    $40.50 - $40.50
    $40.50

    Killer B 3in Coupler Extreme Flow HARD Turbo Inlet

    Killer B Motorsport

    Killer B 3in Coupler Extreme Flow HARD Turbo Inlet

    $45.00
    $45.00 - $45.00
    $45.00
    $40.50
    $40.50 - $40.50
    $40.50
    Save 10% Save %
  • Save 10% Save %
    $39.00
    $39.00 - $39.00
    $39.00
    $35.10
    $35.10 - $35.10
    $35.10

    Killer B FP 84mm to 3in Coupler For Killer B Motorsport Extreme Flow HARD Turbo Inlet

    Killer B Motorsport

    Killer B FP 84mm to 3in Coupler For Killer B Motorsport Extreme Flow HARD Turbo Inlet

    $39.00
    $39.00 - $39.00
    $39.00
    $35.10
    $35.10 - $35.10
    $35.10
    Save 10% Save %
  • Save 10% Save %
    $45.00
    $45.00 - $45.00
    $45.00
    $40.50
    $40.50 - $40.50
    $40.50

    Killer B OEM Coupler for Motorsport Extreme Flow HARD Turbo Inlet

    Killer B Motorsport

    Killer B OEM Coupler for Motorsport Extreme Flow HARD Turbo Inlet. OEM (2.4 inch) to 3 inch coupler for the Killer B Motorsport Extreme Flow HARD T...

    View full details
    $45.00
    $45.00 - $45.00
    $45.00
    $40.50
    $40.50 - $40.50
    $40.50
    Save 10% Save %
  • Sold out
    $199.00
    $199.00 - $199.00
    $199.00
    $179.10
    $179.10 - $179.10
    $179.10

    Killer B Upper Turbo Coolant Reservoir V2 Black AN Fittings for 02-07 WRX / 04+ STI

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    Killer B Upper Turbo Reservoir for EJ motors utilizes the OEM high point location, mounting points, Subaru filler cap, maintains proper cooling sys...

    View full details
    $199.00
    $199.00 - $199.00
    $199.00
    $179.10
    $179.10 - $179.10
    $179.10
    Sold out
  • Sold out
    $179.00
    $179.00 - $179.00
    $179.00
    $161.10
    $161.10 - $161.10
    $161.10

    Killer B Upper Turbo Coolant Reservoir V2 Black Barbed Fittings for 02-07 WRX / 04+ STI

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    Killer B Upper Turbo Reservoir for EJ motors utilizes the OEM high point location, mounting points, Subaru filler cap, maintains proper cooling sys...

    View full details
    $179.00
    $179.00 - $179.00
    $179.00
    $161.10
    $161.10 - $161.10
    $161.10
    Sold out
  • Save 10% Save %
    $49.00
    $49.00 - $49.00
    $49.00
    $44.10
    $44.10 - $44.10
    $44.10

    Killer B High Flow Water Pump Housing Install Kit EJ Series

    Killer B Motorsport
    Only 2 left!

    The EJ Series Installation Kit allows for installation of Killer B's Cast High Flow Water Pump Housing and contains hose and clamps.

    $49.00
    $49.00 - $49.00
    $49.00
    $44.10
    $44.10 - $44.10
    $44.10
    Save 10% Save %
  • Sold out
    $199.00
    $199.00 - $199.00
    $199.00
    $159.20
    $159.20 - $159.20
    $159.20

    Killer B Performance Subaru EJ25 Ultimate Oil Pickup Baffle Combo

    Killer B Motorsport
    Please contact us for availability - Shipping times may vary

    We have all heard the horror stories. You’re just driving down the road minding your own business and then boom. Your engine blows without warning....

    View full details
    $199.00
    $199.00 - $199.00
    $199.00
    $159.20
    $159.20 - $159.20
    $159.20
    Sold out