2015-2021 Subaru STI Parts & Accessories

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  • JDMuscle [15 - 21 WRX/STI] Paint Matched S209 Style Fender Flare Set - JDMuscleBody KitsJDM-WRXS209.97Raw ABS2015 - 2017
    Up to $449.01 off
    In Stock

    JDMuscle Paint Matched S209 Style Fender Flare Set

    Fits: 15-21 WRX/STI

    Only 12 left
    From $849.99
    From $849.99 $1,299.00
  • JDMuscle [15-25 WRX / 15-21 STI] Carbon Fiber STI Spoiler Gurney Flap V1 - Fits 15-21 OEM or 15-25 JDMuscle Final Edition STI Wing

    JDMuscle Carbon Fiber STI Spoiler Gurney Flap V1

    Fits: 15-26 WRX, 15-21 STI

    $249.00
    $249.00 $249.00
  • JDMuscle [15-21 WRX/STI] VS Style Full Carbon Fiber Euro GT Wing

    In Stock

    JDMuscle VS Style Carbon Fiber Euro GT Spoiler *Special Order*

    Fits: 15-21 WRX/STI

    Only 1 left
    From $1,299.00
    From $1,299.00 $1,199.00
  • JDMuscle [15-21 WRX/STI] Custom Carbon Fiber Steering Wheel
    Up to $100 off

    JDMuscle Custom Carbon Fiber Steering Wheel *Special Order*

    Fits: 15-21 WRX/STI

    $549.00
    $549.00 $649.00
  • JDMuscle [15-21 WRX/STI] Paint Matched CS Style Front Lip *Special Order* - JDMuscleFront LipsJDM-WRX15-CS10K1X2015-2017Crystal White Pearl (K1X)
    Up to $319 off
    In Stock

    JDMuscle Paint Matched CS Style Front Lip *Special Order*Ships From MFG*

    Fits: 15-21 WRX/STI

    From $80.00
    From $80.00 $399.00
  • JDMuscle [15-21 WRX/STI] Carbon Fiber Trunk Duck Bill V3

    JDMuscle Vacuum-Fused Carbon Fiber Trunk Duck Bill V3

    Fits: 15-21 WRX/STI

    $299.00
    $299.00 $299.00
  • JDMuscle RGB Front Grille STI Emblem - Mutilple Fitment - JDMuscleOrnaments and EmblemsJDM-STI-RGB

    In Stock

    Racing Art RGB Front Grille Emblem- Mutilple Fitment

    $129.00
    $129.00 $129.00
  • JDMuscle Tanso Carbon Fiber Shift Knob Black [Universal] - JDMuscleShift KnobsJDM-SFT-TAN-LIB-BRegular 160g
    Up to $30.99 off
    In Stock

    JDMuscle Tanso Carbon Fiber Shift Knob Black

    Fits: Universal

    From $49.00
    From $49.00 $79.99
  • Perrin [02-25 WRX/STI, LGT, FXT] Pitch Stop Mount-Red | PSP-DRV-101RD
    Up to $29.25 off

    Perrin Pitch Stop Mount-Red

    Fits: 02-26 WRX/STI/LGT/FXT

    $87.75
    $87.75 $117.00
  • COBB [15 - 21 WRX/STI, 14 - 18 FXT] V3 AccessPORT - JDMusclePlug and Play Engine ManagementcobbAP3-SUB-004
    Up to $77 off
    In Stock

    COBB V3 AccessPORT

    Fits: 15-21 WRX/STI, 14-18 FXT

    $693.00
    $693.00 $770.00
  • Invidia [08-14 WRX/ 08-21 STI] High Flow Catted Downpipe | HS08SW1DPC
    Up to $390 off
    In Stock

    Invidia High Flow Catted Downpipe

    Fits: 08-14 WRX, 08-21 STI

    $861.00
    $861.00 $1,251.00
  • JDMuscle [15-21 WRX/STI] V2 Rain Guards / Window Visors w/ Color Accent

    In Stock

    JDMuscle V2 Rain Guards / Window Visors w/ Color Accent *Special Order*

    Fits: 15-21 WRX/STI

    Only 1 left
    $219.00
    $219.00 $179.00
  • JDMuscle [15-17 WRX/STI] Carbon Fiber Grille V2.5

    JDMuscle Carbon Fiber Grille V2.5

    Fits: 15-17 WRX/STI

    $399.00
    $399.00 $399.00
  • Seibon [15-21 WRX/STI] CW-Style Carbon Fiber Hood | HD15SBIMP-CW
    Up to $150 off
    In Stock

    Seibon CW-Style Carbon Fiber Hood

    Fits: 15-21 WRX/STI

    $1,350.00
    $1,350.00 $1,500.00
  • PERRIN Performance [15-21 WRX/STI] Fender Shrouds | PSP-ENG-550
    Up to $46 off
    In Stock

    PERRIN Fender Shrouds

    Fits: 15-21 WRX/STI

    From $110.25
    From $110.25 $147.00
  • GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo [Subaru Models, incl. 15-21 WRX/STI] | 077046

    In Stock

    GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo

    Fits: Subaru Models, incl. 15-21 WRX/STI

    $80.00
    $80.00 $80.00

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.Β 

  • Engine and drivetrain: intakes, turbo upgrades, exhaust systems, intercoolers, clutches and short shifters.Β 
  • Suspension and handling: coilovers, springs, sway bars, bushings and chassis bracing. Wheels and brakes to put it all to the ground.Β 
  • 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.

Built for the Long Haul

Nobody finishes an STI build in one order. Most owners start with a catback or a set of coilovers. Then they work outward over months or years as their budget allows. That’s the right way to do it. Each mod teaches you something about the car, and staged builds are easier on your wallet.Β 

Our STI aftermarket parts catalog is organized around that reality. Start with bolt-ons that give you immediate feedback. Intake, exhaust, and a proper tune. Move into handling when you’re ready to use the power. Add brakes before you need them. Then chase the cosmetic pieces that make it yours.

If you’re specifically after 2015 STI aftermarket parts, note that many components carry across the full 2015-2021 VA generation, but not all of them. Rear diffusers, headlights, and bumper components changed with the 2018 refresh, so check fitment on anything exterior.Β 

Wheels That Make the Car

Few upgrades change an STI’s presence like a wheel swap. The factory setup looks fine, but the right wheel transforms the stance completely.

2015 STI BBS wheels are the enthusiast benchmark; the factory optional forged BBS setup remains one of the cleanest looks on the platform, and lightweight forged construction means less unsprung weight for your suspension to manage. Beyond BBS, the collection covers a full range of sizes and offsets from trusted manufacturers.

Wheel fitment gets technical fast: bolt pattern, offset, hub bore, and tire clearance all have to work together, especially on lowered cars. Use the Garage feature to filter for wheels that fit your exact year, or hit the chat, and we’ll help you get the specs right the first time.

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.