2015-2021 Subaru STI Parts & Accessories

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  • Up to $183 off
    ACT Heavy Duty Solid 4-Puck Clutch Kit Subaru Legacy GT Spec B 2007-2009 | SB10-HDR4
    ACT

    Heavy Duty Solid 4-Puck Clutch Kit

    Fits: 04-21 WRX STI, 07-09 Legacy GT spec.B

    $78100$964.00 Save $183
    Pay over time · Est. $24.41/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • Subaru OEM Water Pump Gasket 02-14 WRX / 04-19 STI / 05-09 Legacy GT / 04-13 Forester XT | 21114AA051
    Subaru OEM

    Subaru Water Pump Gasket

    Fits: 02-14 WRX, 04-20 WRX STI, 05-09 Legacy GT, 04-13 Forester XT

    $498
  • Subaru OEM Valve Cover Gasket | Left Most Turbo Subaru Models | 13272AA140
    Subaru OEM

    Subaru Left Valve Cover Gasket

    Fits: 04-21 WRX STI, 06-14 WRX

    $1188
  • Subaru OEM Cam Gear Bolt WRX 2006-2014 / STI 2004-2019 / Forester XT 2004-2008 | 13199AA000
    Subaru OEM

    Cam Gear Bolt

    Fits: 06-14 WRX, 04-19 WRX STI, 04-08 Forester XT

    $688
  • ARP 02-14 WRX/ 04-21 STI Case Bolt Kit Subaru EJ Motors | 260-5401
    ARP

    02-14 WRX/ 04-21 STI Case Bolt Kit Subaru EJ Motors | 260-5401

    $50841
    Pay over time · Est. $15.89/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • Subaru OEM WRX Flywheel Bolt WRX/STI 2002-2020 | 800610740
    Subaru OEM

    Flywheel Bolt

    Fits: 02-22 WRX, 04-21 WRX STI

    $178
  • Kartboy 02-25 WRX / 02-21 STI / 05-09 LGT / 04-13 FXT Pitch Stop Mount | KB-015
    Kartboy

    02-25 WRX / 02-21 STI / 05-09 LGT / 04-13 FXT Pitch Stop Mount | KB-015

    $12000
  • APR 15-21 WRX/ STI Carbon Fiber Heat Shield Set | CBX-WRXHS15
    APR Performance

    Carbon Fiber Heat Shield Set

    Fits: 15-21 WRX/STI Sedan

    $46600
    Pay over time · Est. $14.56/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • APR [15-17 WRX/STI] Carbon Fiber Aero Kit | AB-815006
    APR Performance

    APR Carbon Fiber Aero Kit

    Fits: 15-17 WRX/STI

    $2,27900
    Pay over time · Est. $71.22/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • APR 15-21 WRX/STI Carbon Fiber Side Rocker Extensions | FS-815008
    APR Performance

    Carbon Fiber Side Rocker Extensions

    Fits: 15-21 WRX/STI

    $1,05500
    Pay over time · Est. $32.97/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • APR Carbon Fiber Wind Splitter With Rods for WRX/STI W/APR Airdam 2018-up
    APR Performance

    Carbon Fiber Wind Splitter w/ Rods (APR Performance Lip)

    Fits: 18-21 WRX/STI

    $65300
    Pay over time · Est. $20.41/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • VIS Racing 15-2017 Subaru Wrx STI 4Dr OE Style Carbon Fiber Front Lip
    VIS Racing

    4Dr OE Style Carbon Fiber Front Lip

    Fits: 15-17 Wrx/STI

    $64060
    Pay over time · Est. $20.02/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

  • In Stock
    JDMuscle Carbon Fiber Hood Scoop Trim Cover - 2015+WRX/STI
    JDMuscle

    Carbon Fiber Hood Scoop Trim Cover *Special Order*

    Fits: 15-21 WRX/STI

    Only 3 left
    $27595
    Pay over time · Est. $8.62/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • Up to $48 off
    ACT 4-Puck Sprung Race Disc Subaru Legacy GT Spec B 2005-2009 | 4240518
    ACT

    4-Puck Sprung Race Disc

    Fits: 06-09 Legacy GT spec.B

    $20300$251.00 Save $48
    Pay over time · Est. $6.34/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • Up to $49 off
    In Stock
    ACT Performance Street Sprung Disc Subaru Legacy GT Spec B 2005-2009 | 3000503
    ACT

    Performance Street Sprung Disc

    Fits: 07-09 Legacy GT spec.B

    Only 9 left
    $20900$258.00 Save $49
    Pay over time · Est. $6.53/payment
    ⓘ

    Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.
  • Up to $37 off
    ACT 4-Puck Rigid Race Disc Subaru Legacy GT Spec B 2007-2009 | 4240018
    ACT

    4-Puck Rigid Race Disc

    Fits: 06-09 Legacy GT spec.B

    $15700$194.00 Save $37

The VA-chassis STI is one of the most modified platforms in the Subaru universe, and for good reason. The EJ257 responds to upgrades, the chassis rewards better suspension, and the aftermarket support is extensive. This collection brings together STI aftermarket parts for every corner of your 2015-2021 build from top brands Grimmspeed, Perrin Performance, Cobb Tuning, and more. 

  • Engine and drivetrain: intakes, turbo upgrades, exhaust systems, intercoolers, clutches and short shifters. 
  • Suspension and handling: coilovers, springs, sway bars, bushings and chassis bracing. Wheels and brakes to put it all to the ground. 
  • Let’s not forget the cosmetic upgrades: carbon fiber, lip kits, spoilers, lighting and interior accessories from JDMuscle.

Every product listing in our STI aftermarket parts collection has verified information, so you know what fits before you order.

FAQs

Do 2015 STI aftermarket parts fit all VA-generation models?

Many do: the 2015-2021 STI shares its core platform throughout. Engine, drivetrain, and suspension parts usually cross over without issue. Exterior components are the exception, since the 2018 facelift changed several body panels. Always check the fitment info on the listing.

What should I upgrade first on my STI?

Intake, cat-back exhaust, and a professional tune give you the most noticeable gains for the money and lay a foundation for everything after. If handling is your priority, coilovers or springs plus sway bars come first instead of STI aftermarket parts.

Will these parts affect my warranty?

STI aftermarket parts can affect coverage on related components, and most 2015-2021 STIs are outside factory warranty anyway. Check with your dealer if warranty status matters to your build.

Why buy STI aftermarket parts from JDMuscle?

We're a family business run by actual Subaru people. We mod our own cars and handle our own customer service. Curated brands, competitive pricing with our price match guarantee, easy returns, and same-day shipping (Saturdays included). Free shipping over $199 to the continental 48 states.