2015-2021 Subaru STI Parts & Accessories

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  • In Stock
    GrimmSpeed Stealth Box Cold Air Intake Black | 060077
    GrimmSpeed

    StealthBox Cold Air Intake - Black

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

    Only 20 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.
  • Up to $438.18 off
    In Stock
    Invidia 15-21 WRX/STI N1 Cat Back Exhaust w/ Bead Blasted Piping Titanium Tip | HS15SW4BGR1GT
    Invidia

    Invidia

    Fits: 15-21 WRX

    Only 8 left
    $81300$1,251.18 Save $438.18
    Pay over time · Est. $25.41/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.
  • Up to $34.60 off
    In Stock
    Perrin Gurney Flap WRX/STI w/ Premium Wing 15-2020 | PSP-BDY-402BK
    Perrin Performance

    Perrin Gurney Flap for Premium Wing

    Fits: 15-21 WRX/STI

    Only 7 left
    Black Friday Deal: 20% Off Ends 1/4
    $13840$173.00 Save $34.60
  • Up to $51.60 off
    Perrin 15-25 WRX / 05-21 STI / 15-23 Outback/ 15-23 Legacy/ 19-23 Forester 5x114.3 15mm Wheel Spacers | PSP-WHL-115BK
    Perrin Performance

    Perrin 5x114.3 15mm Wheel Spacers | One Pair

    Fits: 15-25 WRX, 05-21 WRX STI, 15-23 Outback, 15-23 Legacy, 19-23 Forester

    Black Friday Deal: 20% Off Ends 1/4
    $20640$258.00 Save $51.60
    Pay over time · Est. $6.45/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.
  • Remark [15-21 WRX/STI] SPT Style Axle Back w/ Double Wall Burnt Tips | RO-TTSP-D
    Remark

    SPT Style Axle Back w/ Double Wall Burnt Tips

    Fits: 15-21 WRX/STI

    $54500
    Pay over time · Est. $17.03/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 Stainless Steel Axle Back w/ Double Wall Burnt Tips | RO-TTVA-D
    Remark

    Stainless Steel Axle Back w/ Double Wall Burnt Tips

    Fits: 15-21 WRX/STI

    $71500
    Pay over time · Est. $22.34/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] Axle Back Exhaust Stainless Single Wall Tips | RO-TSVA-S
    Remark

    Axle Back Exhaust Stainless Single Wall Tips

    Fits: 15-21 WRX/STI

    $59500
    Pay over time · Est. $18.59/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
    Competition Clutch [04-21 STI] Stage 2 Clutch Kit | 15030-2100
    Competition Clutch

    Stage 2 Clutch Kit | 15030-2100

    Fits: 04-21 STI

    $67500
    Pay over time · Est. $21.09/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.
  • Up to $20 off
    In Stock
    ACT Monoloc Collar Subaru / Mitsubishi / Mazda | 884006P
    ACT

    Clutch Monoloc Collar

    Fits: 02-05 WRX, 04-17 WRX STI, 93-95 RX-7, 03-05 Lancer Evolution VIII

    $8500$105.00 Save $20
  • Subaru USDM Thermostat Gasket WRX 2002-2014 / STI 2004-2020 | 21236aa010
    Subaru OEM

    Subaru USDM Thermostat Gasket

    Fits: 02-14 WRX, 04-21 STI

    $800
  • APR Performance [18-21 WRX/STI] Carbon Fiber Front Splitter w/ Factory STI Lip | CW-801808
    APR Performance

    Carbon Fiber Wind Splitter w/ Rods (OEM Lip)

    Fits: 18-21 WRX/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.
  • Up to $76.90 off
    In Stock
    SPL Parts Rear Lower Control Arms WRX 2015+ / STI 2015+ / BRZ 2013+ /Toyota 86 2013+ | SPLRLLFRS - JDMuscleControl ArmssppSPL RLL FRS
    SPL Parts

    Rear Lower Control Arms

    Fits: 15-26 WRX, 15-21 WRX STI, 13-26 BRZ /86

    Only 8 left
    $69210$769.00 Save $76.90
    Pay over time · Est. $21.63/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
    IAG Performance 06 - 14 WRX / 07 - 21 STI / 07 - 12 LGT / 09 - 13 FXT V3 Black Top Feed TGV Housings with Butterfly Pass Thru | IAG - AFD - 3050BK - JDMuscleTGV DeletesIAG-AFD-3050BK
    IAG Performance

    IAG V3 Black Top Feed TGV Housings with Butterfly Pass Thru

    Fits: 08-14 WRX, 07-21 WRX STI, 07-12 Legacy GT, 09-13 Forester XT

    Only 1 left
    $39999
    Pay over time · Est. $12.50/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
    OVERTAKE Wheel Spacers - Pair - 20mm 5x114.3 - Subaru 2015 - 2026 WRX, 2005 - 2021 STI, and more - JDMuscleExterior & BodyA10808
    OVERTAKE

    Wheel Spacers 20mm 5x114.3 - Pair

    Fits: 15-26 WRX, 05-21 WRX STI

    Only 18 left
    $16000
  • Up to $150 off
    Epsilon+ [15-21 WRX/STI VA] WRC Wing
    Epsilon+ Aerodynamics

    Epsilon+ WRC Wing

    Fits: 15-21 WRX/STI VA

    From $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.

  • In Stock
    Overtake [02-26 WRX, 04-21 WRX STI, 13-26 BRZ/86] Driveshaft Carrier Bushings
    OVERTAKE

    Driveshaft Carrier Bushings

    Fits: 02-26 WRX, 04-21 WRX STI, 13-27 BRZ/86, 98-25 Forester, 04-18 FXT

    $3900

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.