2015-2021 Subaru STI Parts & Accessories

3344 products

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  • Up to $28.50 off
    In Stock
    Turbosmart 02 - 07 WRX / 04 - 21 STI Blow Off Valve Kompact Dual Port Black | TS - 0203 - 1015 - JDMuscleBlow Off ValvesTBSTS-0203-1015
    Turbosmart

    Kompact Dual Port Blow Off Valve - Black

    Fits: 02-07 WRX, 04-21 WRX STI, 06-07 FXT

    Only 12 left
    $25649$284.99 Save $28.50
    Pay over time · Est. $8.02/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
    COBB Rear Shifter Bushing [Multiple Subaru Models] - JDMuscleShifter Bushingscobb211330
    COBB Tuning

    Rear Shifter Bushing

    Fits: 02-14 WRX, 04-21 WRX STI, 04-08 Forester XT, 05-09 Legacy GT/Outback XT, 13-26 BRZ/FR-S/GT86/GR86

    $5500

  • In Stock
    COBB 08 - 21 STI Fuel Pressure Regulator For Fuel Rail Kit | 315250 - JDMuscleFuel Pressure Regulatorscobb315250
    COBB Tuning

    Fuel Pressure Regulator for Fuel Rail Kit

    Fits: 08-21 WRX STI

    Only 18 left
    $38000
    Pay over time · Est. $11.88/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.

  • In Stock
    COBB [15 - 18 STI] Stage 1+ Power Package w/ Blue Intake | 616X01P - BK - JDMusclePlug and Play Engine Managementcobb616X01P-BKBlack
    COBB Tuning

    Stage 1+ Power Package - Stealth Black/COBB Blue Intake

    Fits: 15-18 STI

    $1,26500
    Pay over time · Est. $39.53/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 $24 off
    Rexpeed [15 - 21 WRX/STI] Dry Carbon STI Steering Wheel Cover | G44 - JDMuscleTrim KitsG44
    Rexpeed

    Dry Carbon STI Steering Wheel Cover

    Fits: 15-21 WRX/STI

    Black Friday Deal: Extra 10% Off Code REXPEED10 Ends 2/14
    $7500$99.00 Save 24%
  • APR [15 - 21 WRX/STI] Carbon Fiber Rear Bumper Vent | CF - 815004 - JDMuscleDuctsAPRCF-815004
    APR Performance

    APR Carbon Fiber Rear Bumper Vent

    Fits: 15-21 WRX/WRX STI

    $48900
    Pay over time · Est. $15.28/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.
  • TR Twin Scroll High Flow Catless Downpipe WRX 2008 - 2014 / STi 2008+ | TR - ES1006 - JDMuscleFront Pipes and Downpipes / J - PipesTR-ES1006
    Tomioka Racing

    TR Twin Scroll High Flow Catless Downpipe

    Fits: 08-14 WRX, 08-18 WRX STI

    $75000
    Pay over time · Est. $23.44/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 $69 off
    BLOX Racing [13 - 21 BRZ/86, 08 - 23 WRX/STI] Rear Lower Control Arms Updated Silver | BXSS - 50010 - SI - JDMuscleControl ArmsbloBXSS-50010-SI
    BLOX Racing

    Rear Lower Control Arms Updated Silver

    Fits: 13-21 BRZ/86, 08-23 WRX/STI

    $31600$385.00 Save $69
    Pay over time · Est. $9.88/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.
  • Power Stop 2008-17 STI Front & Rear Z23 Evolution Sport Brake Kit w/Calipers | KC4490 - JDMuscleBrake KitspsbKC4490
    PowerStop

    Power Stop Front & Rear Z23 Evolution Sport Brake Kit w/Calipers

    Fits: 08-17 WRX STI

    $1,48929
    Pay over time · Est. $46.54/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 $26 off
    In Stock
    Radium Engineering [08-21 WRX/STI] V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0780-00
    Radium Engineering

    V2 Fuel Pump Hanger for use w/ Walbro 255LPH GSS342 or AEM 340LPH 50-1200 Pumps

    Fits: 08-21 WRX/WRX STI

    Only 7 left
    $49395$519.95 Save $26
    Pay over time · Est. $15.44/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.
  • OLOLM S207 STYLE PIANO BLACK WING | SPOILER 15+ WRX / 15+ STI | A.70032.4 - JDMuscleSpoilers and WingsOLMA.70032.4
    OLM

    S207 Style Piano Black Wing / Spoiler

    Fits: 15-21 WRX/STI

    $59880
  • Up to $8.75 off
    Verus Engineering [15-21 WRX/STI] Front Splitter | A0027A - JDMuscleFront Wind SplitterVERA0027A
    Verus Engineering

    Front Splitter

    Fits: 15-21 WRX/STI

    $38720$395.95 Save $8.75
    Pay over time · Est. $12.10/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
    Rally Armor [15-21 WRX/STI] UR Mudflaps - Black Urethane w/ New Era Blue Logo
    Rally Armor

    UR Mudflaps - Black Urethane w/ New Era Blue Logo

    Fits: 15-21 WRX/STI

    Only 2 left
    $19050
  • Up to $79.90 off
    In Stock
    XForce [08-14 WRX, 08-21 STI] Pro Series Catted Downpipe | ES-SW08-KITB - JDMuscleFront Pipes and Downpipes / J-PipesES-SW08-KITB
    XForce

    Pro Series Catted Downpipe

    Fits: 08-14 WRX, 08-21 WRX STI

    Only 10 left
    $71910$799.00 Save $79.90
    Pay over time · Est. $22.47/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.
  • Megan Racing Street Series Coilover Kit WRX/STI 15-21 | MR-CDK-SI15STI - JDMuscleCoiloversMRSMR-CDK-SI15STI
    Megan Racing

    Street Series Coilover Kit

    Fits: 15-21 WRX/STI

    $1,31880
  • Up to $31.60 off
    In Stock
    Perrin 02-14 WRX / 04-21 STI / 05-09 Legacy / 04-13 Forester Lightened Crank Pulley Blue | PSP-ENG-100BL - JDMusclePulleysperPSP-ENG-100BL
    Perrin Performance

    Perrin Crank Pulley — Blue

    Fits: 02-14 WRX, 04-21 WRX STI, 05-09 Legacy, 04-13 Forester XT

    Only 12 left
    Black Friday Deal: 20% Off Ends 1/4
    $12640$158.00 Save $31.60

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.