2015-2021 Subaru STI Parts & Accessories

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  • Up to $100 off
    JDMuscle Tanso HT STYLE V1 FRONT CARBON FIBER LIP for 15-17 WRX/STI
    JDMuscle

    HT Style Carbon Fiber Front Lip *Special Order*

    Fits: 15-17 WRX/STI

    $39900$499.00 Save $100
    Pay over time · Est. $12.47/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
    GrimmSpeed Radiator Hose Kit Red
    GrimmSpeed

    Radiator Hose Kit - Red

    Fits: 08-14 WRX, 08-21 STI, 09-13 Forester XT, 05-09 Legacy GT/Outback XT, 09-10 Forester, 08-11 Impreza

    $11900

  • In Stock
    GrimmSpeed StealthBox Cold Air Intake Red | 060078
    GrimmSpeed

    StealthBox Cold Air Intake - Red

    Fits: 15-21 STI, 18-21 STI Type RA

    Only 13 left
    $48400
    Pay over time · Est. $15.13/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
    Injector Dynamics [02-14 WRX, 07-21 STI] ID1050x Top Feed Fuel Injectors Set of 4
    Injector Dynamics

    ID1050x Top Feed Fuel Injectors Set of 4

    Fits: 02-14 WRX, 07-21 STI

    $60060
    Pay over time · Est. $18.77/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 $35 off
    Perrin 08-21 WRX/STI Upper Radiator Bracket Set Red | PSP-ENG-521
    Perrin Performance

    Perrin Upper Radiator Bracket Set - Black/Red

    Fits: 08-21 WRX/STI

    From $4700$82.00 Save 43%
  • Up to $22 off
    In Stock
    Cusco Rear Type OS Strut Bar WRX/STI 15-21
    Cusco

    Rear Strut Tower Bar Type OS

    Fits: 15-21 WRX/STI

    Only 6 left
    $19800$220.00 Save $22
  • Up to $7 off
    In Stock
    Cusco [08-14 WRX / 08-21 STI / 05-09 Legacy / 09-13 Forester] Power Brace Power Steering Rack | 692-026-ALHD
    Cusco

    Power Steering Rack Brace

    Fits: 08-14 WRX, 08-21 STI, 05-09 Legacy, 09-13 Forester

    Only 13 left
    $6300$70.00 Save 10%
  • Up to $112 off
    In Stock
    ACT [04-21 STI] Streetlite Flywheel
    ACT

    Streetlite Flywheel

    Fits: 04-21 STI

    $47600$588.00 Save $112
    Pay over time · Est. $14.88/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 $205 off
    In Stock
    ACT [04-21 STI / 07-09 LGT] Spec B Xtreme Duty Performance Street Disc Clutch Kit | SB10-XTSS
    ACT

    Xtreme Duty Performance Street Disc Clutch Kit

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

    Only 12 left
    $87500$1,080.00 Save $205
    Pay over time · Est. $27.34/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 $8 off
    Overtake [06-26 WRX, 06-21 WRX STI] Clutch Delay Valve Delete
    Overtake

    Clutch Delay Valve Delete

    Fits: 06-26 WRX, 06-21 WRX STI

    $3900$47.00 Save 17%

  • In Stock
    OLM [15 - 21 WRX/STI, 13 - 22 FR - S/BRZ/86, 14 - 18 Forester, 13+ Crosstrek] Signature Series E - brake Handle - Black Carbon w/Red | A.70217.1 - RD - JDMuscleInterior AccessoriesOLMA.70217.1-RD
    OLM

    Signature Series E-brake Handle - Black Carbon w/Red

    Fits: 15-21 WRX/STI, 13-22 FR-S/BRZ/86, 14-18 Forester, 13+ Crosstrek

    $7900
  • OLM [15 - 21 WRX/STI] S208 Style Carbon Fiber Front Bumper Lip | A.70030.1 - JDMuscleFront LipsOLMA.70030.1
    OLM

    S208 Style Carbon Fiber Front Bumper Lip

    Fits: 15-21 WRX/STI

    $51900

  • In Stock
    OLM [15 - 21 WRX/STI] V2 Rear Window Visor | OLMA.70233.1 - JDMuscleDiffusers and Vortex GeneratorsOLMA.70233.1
    OLM

    V2 Rear Window Visor

    Fits: 15-21 WRX/STI

    Only 11 left
    $11995
  • Up to $11.60 off
    In Stock
    Perrin Performance [05 - 25 Subaru WRX, STI, Forester, Outback, XT, Legacy GT, Impreza] Transmission Crossmember Bushings - JDMuscleTransmission and Differential BushingsperPSP-DRV-141
    Perrin Performance

    Perrin Transmission Crossmember Bushings - Manual Transmission

    Fits: 08-26 WRX, 08-21 WRX STI, 05-14 Legacy/Outback, 08-13 Forester, 05-23 Impreza, 14-23 Crosstrek

    Black Friday Deal: 20% Off Ends 1/4
    $4640$58.00 Save 20%
  • Up to $50 off
    Noble [15 - 21 WRX/STI] OE STI Style Spoiler - World Rally Blue - JDMuscleSpoilers and Wingsnol15WRX.SPL.STI.K7X
    Noble Performance

    Noble OE STI Style Spoiler - World Rally Blue

    Fits: 15-21 WRX/STI

    $44999$499.99 Save $50
  • AeroflowDynamics 2015 - 2021 Subaru Wrx/Sti Side Skirt Extension V3 - JDMuscleSide SkirtsAFD-VA-AL-SS-EXT-V3-NOLINENo liner
    AeroflowDynamics

    Side Skirt Extension V3

    Fits: 15-21 WRX/STI

    $29999
    Pay over time · Est. $9.37/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.

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.