2015-2021 Subaru STI Parts & Accessories

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  • Injector Dynamics [02-14 WRX, 07-19 WRX STI] ID2000 Fuel Injectors Set of 4
    Injector Dynamics

    ID2000 Fuel Injectors Set of 4

    Fits: 02-14 WRX, 07-19 WRX STI

    $96000
    Pay over time · Est. $30.00/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 $697.72 off
    Invidia 15-21 WRX/STI Q300 Cat Back Exhaust w/ Single Wall Stainless Steel Tips | HS15STIG2S
    Invidia

    Q300 Cat-Back Exhaust - Quad Stainless Tips

    Fits: 15-21 WRX/STI

    $1,53500$2,232.72 Save $697.72
    Pay over time · Est. $47.97/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.
  • Up to $604.52 off
    Invidia 15-21 WRX/STI Full Titanium Cat Back Exhaust | HS15SW4TRG
    Invidia

    Full Titanium Cat-Back Exhaust - Single Exit

    Fits: 15-21 WRX/STI

    $1,28800$1,892.52 Save $604.52
    Pay over time · Est. $40.25/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.
  • Up to $783.20 off
    Invidia Gemini R400 Cat-Back Exhaust - Full Titanium
    Invidia

    Invidia

    Fits: 15-21 WRX

    $1,72600$2,509.20 Save $783.20
    Pay over time · Est. $53.94/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 $514.66 off
    In Stock
    Invidia 08-14 WRX / 05-21 STI Equal Length Race Header | HS05SW1HDR
    Invidia

    Equal Length Race Header

    Fits: 08-14 WRX, 05-21 WRX STI

    Only 4 left
    $1,13300$1,647.66 Save $514.66
    Pay over time · Est. $35.41/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 $14.40 off
    In Stock
    Perrin 08-21 WRX/STI / 05-09 LGT / 13-17 Crosstrek / 14-15 FXT Panel Filter | PSP-INT-110
    Perrin Performance

    Perrin Panel Filter

    Fits: 08-21 WRX/STI, 05-09 LGT, 13-17 Crosstrek, 14-15 FXT

    Only 6 left
    $5760$72.00 Save 20%
  • Up to $19.80 off
    In Stock
    Perrin 04-21 STI 6-Speed Short Shifter Adapter | PSP-INR-220
    Perrin Performance

    Perrin 6-Speed Short Shifter Adapter

    Fits: 04-21 STI

    Only 2 left
    $7920$99.00 Save 20%
  • Up to $282.20 off
    In Stock
    Perrin Front Mount Intercooler | Black Core and Beam Only WRX/STI 15-21 | PSP-ITR-437-1BK
    Perrin Performance

    Perrin Front Mount Intercooler Black Core and Beam

    Fits: 15-21 WRX/STI

    Only 3 left
    $1,12880$1,411.00 Save $282.20
    Pay over time · Est. $35.28/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.
  • Up to $38.19 off
    In Stock
    Whiteline 11-21 STI / 15-25 WRX Anti Lift Kit Race Version | KCA425M
    Whiteline

    Anti-Lift Kit Race Version

    Fits: 11-21 WRX STI, 15-25 WRX

    Only 4 left
    $34369$381.88 Save $38.19
    Pay over time · Est. $10.74/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 $20.69 off
    In Stock
    Whiteline 08-21 WRX/STI / 10-12 LGT / 09-13 FXT / 13-21 BRZ Rear Upper Inner Control Arm Bushing Kit | W63225
    Whiteline

    Rear Upper Inner Control Arm Bushing Kit

    Fits: 08-21 WRX, 08-21 WRX STI, 10-12 Legacy GT, 09-13 Forester XT, 13-21 BRZ

    Only 8 left
    $18619$206.88 Save $20.69
  • Up to $35.09 off
    In Stock
    Whiteline 15-21 STI Lowering Spring Kit | WSK-SUB007
    Whiteline

    Lowering Spring Kit

    Fits: 15-21 WRX STI

    Only 9 left
    $31579$350.88 Save $35.09
    Pay over time · Est. $9.87/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 $16.89 off
    In Stock
    Whiteline 15-21 WRX/STI / 14-18 FXT Rear Subframe Bushing Mount Kit | KDT937
    Whiteline

    Rear Subframe Bushing Mount Kit

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

    Only 7 left
    $15199$168.88 Save $16.89
  • Up to $17.59 off
    In Stock
    Whiteline 08-21 WRX/STI / 09-13 FXT / 13-21 BRZ Rear Control Arm Lower Outer Bushing | W63412
    Whiteline

    Rear Control Arm Lower Outer Bushing

    Fits: 08-21 WRX/STI

    Only 5 left
    $15829$175.88 Save $17.59
  • Up to $4.59 off
    In Stock
    Whiteline 04-21 STI / 07-09 Legacy Spec B Front and Rear Shifter Bushings | KDT958
    Whiteline

    Front and Rear Shifter Bushings

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

    $4129$45.88 Save 10%
  • Remark 15-21 WRX/STI Cat Back Exhaust Titanium Stainless Single Wall Tip w/Resonated Mid Pipe- Discontinuing NO RETURNS
    Remark

    Cat Back Exhaust w/ Resonated Mid Pipe - Stainless Steel Single Wall Tips

    Fits: 15-21 WRX/STI

    $1,17000
    Pay over time · Est. $36.56/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.
  • Remark 15-21 WRX/STI Sports Touring Non Resonated Cat Back w/ Polished Stainless Tips | RK-C4076S-01
    Remark

    Remark

    Fits: 15-21 WRX

    $1,39500
    Pay over time · Est. $43.59/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.

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.