2015-2021 Subaru STI Parts & Accessories

3321 products

Clear all

  • In Stock
    Extreme Online Store [18 - 21 WRX/STI] HT Style Front Splitter Lip Ground Effect - JDMuscleFront LipsFLIP-298-BKCFCarbon Fiber
    EOS

    HT Style Front Splitter Lip Ground Effect

    Fits: 18-21 WRX/STI

    Only 1 left
    $31000
    Pay over time · Est. $9.69/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 [08 - 14 WRX, 08 - 21 STI] Silicone Radiator Hose Kit Black - JDMuscleRadiator HosescobbB22400-BK
    COBB Tuning

    Silicone Radiator Hose Kit - Black

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

    $12000
  • Up to $23.05 off
    In Stock
    Mishimoto [08 - 21 WRX/STI] Aluminum Coolant Overflow Tank - Polished | MMRT - STI - 08 - JDMuscleOverflow Tanks / Coolant Tank and AccessoriesMIMMRT-STI-08
    Mishimoto

    Aluminum Coolant Overflow Tank - Polished

    Fits: 08-21 WRX/STI

    Only 5 left
    $23395$257.00 Save $23.05
    Pay over time · Est. $7.31/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 $1.60 off
    In Stock
    Turbosmart [02 - 07 WRX, 04 - 21 STI] 34mm Blow Off Valve Plug | TS - 0205 - 2016 - JDMuscleBlow Off ValvesTBSTS-0205-2016
    Turbosmart

    34mm Blow Off Valve Plug

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

    $1439$15.99 Save 10%
  • Cobb 08 - 25 WRX/STI 12mm Urethane Exhaust Hanger - JDMuscleExhaust Hangerscobb511312
    COBB Tuning

    12mm Urethane Exhaust Hanger

    Fits: 08-25* WRX, 08-21 STI, 22+ BRZ/GR86, 14-18 Forester XT, 05-09 Legacy GT/Spec B, 05-09 Outback XT, 09-10 Impreza 2.5GT

    $2000
  • Subaru OEM 18-21 WRX/STI Left Side Gloss Black Surround Fog Light Bezel | 57731VA510 - JDMuscleFog Lightssub57731VA510
    Subaru

    OEM Left Side Gloss Black Surround Fog Light Bezel

    Fits: 18-21 WRX/STI

    $12568
  • Forced Performance 04-21 Subaru STI/ 02-07 WRX FP GREEN 57S Turbocharger 84MM CH 8CM Turbine Housing External Wastegate Oil Line Included | 2029130 - JDMuscleTurbosFPT2029130
    Forced Performance Turbos

    Forced Performance FP GREEN 57S Turbocharger 84MM CH 8CM Turbine Housing External Wastegate Oil Line Included

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

    $7,37400
    Pay over time · Est. $230.44/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.

  • In Stock
    Driveshaft Shop [15-21 STI] 1-Piece Carbon Fiber Driveshaft - JDMuscleDrive Shafts and Drivelinesdss610265
    Driveshaft Shop

    1-Piece Carbon Fiber Driveshaft

    Fits: 15-21 WRX STI

    Only 3 left
    $1,29998
    Pay over time · Est. $40.62/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.
  • APR [15-21 WRX/STI] Carbon Fiber Radiator Cooling Plate | CF-815002 - JDMuscleRadiator ShroudsAPRCF-815002
    APR Performance

    Carbon Fiber Radiator Cooling Shroud

    Fits: 15-21 WRX/STI

    $26400
    Pay over time · Est. $8.25/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.
  • JDMuscle [15-21 WRX/STI] VS Style Rear Bumper *Special Order*No Refunds* - JDMuscleBody KitsJDM-WRX15-VS-BUMR-22x2 Carbon Fiber
    JDMuscle

    VS Style Rear Bumper *Special Order*No Refunds*

    Fits: 15-21 WRX/STI

    From $1,55000
    Pay over time · Est. $48.44/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.
  • JDMuscle [15-21 WRX/STI] Tanso Carbon Fiber VS Style Side Skirt - JDMuscleSide SkirtsJDM-WRX15-SS-VS-1FRPFRP
    JDMuscle

    Tanso Carbon Fiber VS Style Side Skirt

    Fits: 15-21 WRX/STI

    From $95000
    Pay over time · Est. $29.69/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 $20.79 off
    In Stock
    AWE Tuning [11-25 WRX Sedan, 11-21 STI Sedan] Touring to Track Conversion Axle Back Exhaust - JDMuscleAxle Back Exhaustsawe3820-41004
    AWE Tuning

    Touring to Track Conversion Axle Back Exhaust

    Fits: 11-21 WRX Sedan, 11-21 STI Sedan

    Only 6 left
    $39500$415.79 Save $20.79
    Pay over time · Est. $12.34/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.

  • In Stock
    Remark [15-21 WRX/STI] R1-Spec Single-Exit Cat Back Exhaust w/ Stainless Tip - JDMuscleCat Back Exhaust SystemremRK-C1076S-01
    Remark

    R1-Spec Single-Exit Cat-Back Exhaust w/ Stainless Tip

    Fits: 15-21 WRX/STI

    Only 8 left
    $99500
    Pay over time · Est. $31.09/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 [15-21 WRX/STI] Pre-Preg Carbon Fiber Steering Wheel Lower Cover *CLEARANCE*NO RETURNS* - JDMuscleSteering WheelsJDM-WRX15-LSWC
    JDMuscle

    Pre-Preg Carbon Fiber Steering Wheel Lower Cover *CLEARANCE*NO RETURNS*

    Fits: 15-21 WRX/STI

    Only 5 left
    $13900

  • In Stock
    JDMuscle [15-21 WRX/STI] Paint-Matched Headlight Eyelids *Special Order* - JDMuscleExterior GarnishesJDM-WRX15-EYE2-K1XCrystal White Pearl (K1X)
    +9
    JDMuscle

    Paint-Matched Headlight Eyelids *Special Order*

    Fits: 15-21 WRX/STI

    Only 3 left
    $14900
  • Up to $5 off
    In Stock
    Radium Engineering 15-21 WRX/STI Master Cylinder Brace | 20-0255
    Radium Engineering

    Master Cylinder Brace

    Fits: 15-21 WRX/STI, 14-18 Forester XT

    Only 10 left
    $9495$99.95 Save 5%

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.