2015-2021 Subaru STI Parts & Accessories

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    Noble [15 - 21 WRX/STI] OE STI Style Spoiler - Dark Grey Metallic | 15WRX.SPL.STI.61K - JDMuscleSpoilers and Wingsnol15WRX.SPL.STI.61K
    Noble Performance

    Noble OE STI Style Spoiler - Dark Grey Metallic | 15WRX.SPL.STI.61K

    Fits: 15-21 WRX/STI

    Only 11 left
    $44999$499.99 Save $50
    Pay over time · Est. $14.06/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.
  • Up to $50 off
    Noble OE STI Style Spoiler 15 - 21 WRX / STI - Crystal Black Silica - JDMuscleSpoilers and Wingsnol15WRX.SPL.STI.D4S
    Noble Performance

    Noble OE STI Style Spoiler 15-21 WRX / STI - Crystal Black Silica

    $44999$499.99 Save $50

  • In Stock
    AeroflowDynamics 2015 - 2021 Subaru Wrx/Sti Rear Bumper Canards V1 - JDMuscleCanardssku-35752430798
    AeroflowDynamics

    Rear Bumper Canards V1

    Fits: 15-21 WRX/STI

    Only 1 left
    $26999
    Pay over time · Est. $8.44/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.
  • Up to $58 off
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    Tein [15 - 21 WRX, 15 - 21 WRX STI] RX1 Coilovers | VSSB0 - M1SS4 - JDMuscleCoiloversteinVSSB0-M1SS4
    Tein

    RX1 Coilovers

    Fits: 15-21 Subaru WRX/STI

    Only 4 left
    $1,49200$1,550.00 Save $58
    Pay over time · Est. $46.63/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.

  • In Stock
    Extreme Online Store [15 - 21 WRX/STI] Resonated Mid - Pipe - JDMuscleExhaust Mid PipesEXT-MP011Subaru WRX / STi
    EOS

    Resonated Mid-Pipe

    Fits: 15-21 WRX/STI

    Only 1 left
    $33000
    Pay over time · Est. $10.31/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.

  • In Stock
    Torque Solution [02 - 25 WRX, 04 - 21 STI, 13 - 21 BRZ/FR - S/86] Flywheel Lock Tool | TS - TL - 756 - JDMuscleFlywheelstqsTS-TL-756
    Torque Solution

    Flywheel Lock Tool

    Fits: 02-25 WRX, 04-21 WRX STI, 13-21 BRZ/FR-S/86

    $2777

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    GrimmSpeed [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] Intake Manifold to TGV Gasket Pair | 023001 - JDMuscleIntake System Gasketgrm023001
    GrimmSpeed

    Intake Manifold-To-TGV Gasket (Pair)

    Fits: 02-07 WRX, 04-20 WRX STI, 04-08 Forester XT, 05-09 Legacy GT

    Only 1 left
    $2900
  • Subaru OEM [12 - 21 WRX/STI, 13 - 17 Crosstrek, 12 - 18 Forester] Footwell Illumination Kit Red | H701SFJ101 - JDMuscleInterior LightingH701SFJ101
    Subaru OEM

    Footwell Illumination Kit Red

    Fits: 12-21 WRX/STI, 13-17 Crosstrek, 12-18 Forester

    $14995

  • In Stock
    Grimmspeed 04 - 21 STI / 02 - 07 WRX V2 Bypass Valve Red | 126032RED - JDMuscleValvesgrm126032RED
    GrimmSpeed

    V2 Bypass Valve - Red

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

    Only 1 left
    $29900
    Pay over time · Est. $9.34/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.
  • Up to $17 off
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    Cusco [02-26 WRX/STI, LGT, FXT] Pitch Stop Mount - Blue
    Cusco

    Pitch Stop Mount - Blue

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

    Only 3 left
    $15300$170.00 Save $17

  • In Stock
    Cobb [15 - 21 WRX/STI] Adjustable Toe Arm & Adjustable Lower Control Arm Package - JDMuscleSuspension PackagescobbCB-0015
    COBB Tuning

    Adjustable Toe Arm & Adjustable Lower Control Arm Package

    Fits: 08-21 WRX/STI, 13-26 BRZ, 13-16 FR-S, 17-21 GT86, 22-26 GR86, 08-14 Impreza

    Only 15 left
    $57500
    Pay over time · Est. $17.97/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.

  • In Stock
    COBB [Subaru Models] Battery Tie Down - Black - JDMuscleBattery Tie Downs and Trayscobb800160
    COBB Tuning

    Battery Tie Down - Black

    Fits: 02-26 WRX, 04-21 WRX STI, 13-26 BRZ, 13-21 FR-S/GT86, 22-26 GR86, 04-17 Forester XT, 05-12 Legacy GT, 05-09/20-23 Outback XT/Wilderness

    $7500
  • Subaru OEM 07 - 25 WRX STI Euro - Style Marque Plate Delete Matte Black w/ WRX Logo | SOA342L131 - JDMuscleLicense Plate Holders and DeletesSUBSOA342L131
    Subaru OEM

    Euro-Style Marque Plate Delete - Matte Black w/ WRX Logo

    Fits: 07-25 WRX/STI

    $3195
  • Up to $70.40 off
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    Perrin [08 - 21 WRX/STI] Front Strut Brace - Hyper Pink | PSP - SUS - 056HP - JDMuscleStrut Tower BarsperPSP-SUS-056HP
    Perrin Performance

    Perrin Front Strut Brace - Hyper Pink

    Fits: 08-21 WRX/STI, 14-18 Forester, 05-09 Legacy/Outback, 13-17 Crosstrek, 08-16 Impreza

    Only 5 left
    Black Friday Deal: 20% Off Ends 1/4
    $28160$352.00 Save $70.40
    Pay over time · Est. $8.80/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.
  • Up to $17.10 off
    In Stock
    Torque Solution [08 - 14 WRX, 08 - 21 STI] PNP Speed Density Kit - Stainless Bung | TS - WH - 499PS - JDMuscleEngine Management SensorstqsTS-WH-499PS
    Torque Solution

    PNP Speed Density Kit Stainless Bung

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

    Only 14 left
    $8400$101.10 Save $17.10

  • In Stock
    IAG [02-07 WRX, 04-21 STI, 04-08 FXT] Street Series Engine Mounts
    IAG Performance

    IAG Street Series Engine Mounts

    Fits: 02-07 WRX, 04-21 WRX STI, 04-08 FXT

    Only 1 left
    $26999
    Pay over time · Est. $8.44/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.

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.