2015-2021 Subaru STI Parts & Accessories

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  • Up to $21 off
    In Stock
    Perrin 18-21 WRX / 18-21 STI / 13-22 BRZ / 13-16 FRS / 17-21 GT86 Front Tow Hook | PSP-BDY-235-PARENT
    Perrin Performance

    Perrin Front Tow Hook

    Fits: 18-21 WRX/STI, 13-22 BRZ, 13-16 FRS, 17-21 GT86

    Only 13 left
    Black Friday Deal: 20% Off Ends 1/4
    $8400$105.00 Save $21
  • Verus Engineering 15-21 WRX/STI Front Splitter Support System | A0057A
    Verus Engineering

    Front Splitter Support System

    Fits: 15-21 WRX/STI

    $16830

  • In Stock
    HKS 06-14 WRX / 04-21 STI Stainless Steel Equal Length Exhaust Manifold | 14019-AF002
    HKS

    Stainless Steel Equal Length Exhaust Manifold

    Fits: 06-14 WRX, 04-21 WRX STI

    $77000
    Pay over time · Est. $24.06/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.
  • GCS CS Style Rear F1 Fog / Brake Light 2015+ WRX / 2015+ STI / 2013+ Crosstrek
    GCS

    CS Style Rear F1 Fog / Brake Light 2015+ WRX / 2015+ STI / 2013+ Crosstrek

    $8900

  • In Stock
    Remark 15-21 WRX/STI Stainless Steel Axle Back w/ Single Wall 4 Inch Burnt Tips | RO-TTVA-S4
    Remark

    Axle Back Exhaust w/ 4 Inch Single Wall Burnt Tips

    Fits: 15-21 WRX/STI

    Only 2 left
    $69500
    Pay over time · Est. $21.72/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 Mud Flap White w/ Black Logo WRX/STI Sedan 15-2020
    Rally Armor

    White UR Mud Flap w/Black Logo

    Fits: 15-21 WRX/STI

    Only 5 left
    $21250
    Pay over time · Est. $6.64/payment
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    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.
  • Kartboy 04-21 STI Shifter Bushing Combo | KB-003-6COMB
    Kartboy

    Shifter Bushing Combo 6MT

    Fits: 04-21 WRX STI

    $6300

  • In Stock
    Gates [06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT] Timing Kit w/ Water Pump | TCKWP328
    Gates

    Timing Belt Component Kit with Water Pump

    Fits: 06-07 WRX, 04-19 WRX STI, 05-09 Legacy GT, 04-09 Forester XT

    Only 17 left
    $42100
    Pay over time · Est. $13.16/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 $160 off
    Perrin Neon Yellow Air Oil Separator 2008-2014 WRX / 2002-2020 STI with Top Mount Intercooler | PSP-ENG-606NY
    Perrin Performance

    Perrin Neon Yellow Air Oil Separator w/ Top Mount Intercooler

    Fits: 08-14 WRX, 08-21 STI, 05-09 LGT/OBXT

    $41200$572.00 Save $160

  • In Stock
    Sparco Drivers Side Seat Base WRX/STI 15-21 | 600SB206L
    Sparco

    Seat Base Driver Side

    Fits: 15-21 WRX/STI

    Only 8 left
    $19900
  • Up to $31.99 off
    In Stock
    Eagle 02-14 WRX/ 04-21 STI Connecting Rods
    Eagle

    H-Beam Connecting Rods

    Fits: 02-14 WRX, 04-21 WRX STI

    Only 14 left
    $37500$406.99 Save $31.99
    Pay over time · Est. $11.72/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 $70 off
    In Stock
    Seibon 18-21 WRX/STI OEM-Style Carbon Fiber Front Grill | FG18SBIMP
    Seibon

    Carbon Fiber Front Grille

    Fits: 18-21 WRX/STI

    Only 18 left
    $63000$700.00 Save $70
    Pay over time · Est. $19.69/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 $20.10 off
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    Torque Solution [15-21 WRX/STI / 14-18 Forester / 14-17 Crosstrek] Master Cylinder Brace | TS-SU-392
    Torque Solution

    Brake Master Cylinder Brace

    Fits: 15-21 WRX, 15-21 WRX STI, 14-18 Forester, 14-17 Crosstrek

    Only 17 left
    $9100$111.10 Save $20.10
  • Up to $81.98 off
    In Stock
    TurboXS RFL Blow Off Valve
    Turbo XS

    TurboXS RFL Blow Off Valve

    Fits: 02-07 WRX, 04-21 STI

    $24300$324.98 Save $81.98
    Pay over time · Est. $7.59/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.
  • Grimmspeed Up Pipe 3-Bolt Inlet - Subaru 2002-2014 WRX / 2004-21 STI / 2005-2009 LGT / 2004-2013 FXT | 007064
    GrimmSpeed

    Up Pipe - 3-Bolt Inlet

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

    $39300
    Pay over time · Est. $12.28/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 $58.40 off
    In Stock
    Perrin 08-25 WRX / 08-21 STI / 13-22 BRZ / 13-16 FRS / 17-21 GT86 / 2022 GR86 Spherical Rear Endlinks | PSP-SUS-235
    Perrin Performance

    Perrin Spherical Rear Endlinks

    Fits: 08-25 WRX, 08-21 STI, 13-22 BRZ, 13-16 FRS, 17-21 GT86, 2022 GR86

    Only 7 left
    Black Friday Deal: 20% Off Ends 1/4
    $23360$292.00 Save $58.40
    Pay over time · Est. $7.30/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.