2015-2021 Subaru STI Parts & Accessories

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  • In Stock
    EOS Tow Hook License Plate Mount Bracket
    EOS

    Tow Hook License Plate Mount Bracket

    Fits: 18-21 WRX/STI

    Only 4 left
    From $6000
  • Extreme Online Store [15 - 17 WRX / STI] VRS Style Front Splitter Lip Ground Effect - JDMuscleFront LipsFLIP-296-BKCFCarbon Fiber
    EOS

    VRS Style Front Splitter Lip Ground Effect

    Fits: 15-17 WRX/STI

    From $17000

  • In Stock
    GrimmSpeed [15 - 25 WRX/ 15 - 21 STI] High Lift Hood Struts | 113072 - JDMuscleStruts And Shocksgrm113072
    GrimmSpeed

    High-Lift Hood Struts

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

    $13600
  • JDMuscle [15 - 21 WRX/STI] Vol Style Carbon Fiber GT Wing - JDMuscleSpoilers and WingsJDM-WRX15-VOLCF2x2 Twill
    JDMuscle

    Vol Style Carbon Fiber GT Wing

    Fits: 15-21 WRX/STI

    From $1,49900
    Pay over time · Est. $46.84/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
    AMS Performance 15 - 25 WRX / 04 - 21 STi 6 - Speed Billet Shift Knob | Incl Red, Black, & Gunmetal Cap | AMS.50.06.0002 - 1 - JDMuscleShift KnobsamsAMS.50.06.0002-1
    AMS

    Performance 6-Speed Billet Shift Knob - Incl Red, Black, & Gunmetal Cap

    Fits: 15-26 WRX, 04-21 WRX STI

    Only 7 left
    $8096
  • Up to $232.94 off
    In Stock
    MBRP [15 - 21 WRX/STI] 3"Catback Exhaust w/ 3.5" Tips - Race Version | S4802304 - JDMuscleCat Back Exhaust SystemmbrpS4802304
    MBRP

    3in Dual Split Rear Exit Cat-Back Exhaust w/ 3.5in Tips - T304 - Race Version

    Fits: 11-14 WRX/STI Sedan, 15-21 WRX/STI

    $98999$1,222.93 Save $232.94
    Pay over time · Est. $30.94/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.

  • In Stock
    HKS 08 - 21 STI / 08 - 14 WRX Fine Tune Power Steering / Alternator V - Belt | 24996 - AK012 - JDMuscleAccessory Beltshks24996-AK012
    HKS

    Fine Tune Power Steering / Alternator V-Belt

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

    Only 17 left
    $5500
  • Up to $22.21 off
    In Stock
    Torque Solution 06 - 14 WRX / 04 - 21 STI Stock Location Turbo Oil Feed Line | TS - SU - 577 - JDMuscleOil Feed Lines and FittingsTS-SU-577
    Torque Solution

    Stock Location Turbo Oil Feed Line

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

    $10000$122.21 Save $22.21

  • In Stock
    COBB 15 - 21 STI Redline Intake Replacement Intake Filter - JDMuscleAir Intake Filter Replacementscobb7V2101
    COBB Tuning

    Redline Carbon Fiber Intake Replacement Filter

    Fits: 15-21 WRX STI

    Only 14 left
    $7500
  • Up to $23.40 off
    In Stock
    Perrin [15 - 21 WRX/STI] Radiator Shroud | With OEM Intake Scoop - Red - JDMuscleNon - CategorizedperPSP-ENG-512-4RD
    Perrin Performance

    Perrin Radiator Shroud | With OEM Intake Scoop - Red

    Fits: 15-21 WRX/STI

    Only 8 left
    Black Friday Deal: 20% Off Ends 1/4
    $9360$117.00 Save $23.40
  • Subaru OEM [15 - 21 WRX/STI] STI Special Edition Cherry Blossom STI Side Ornaments | 91123VA300 - 91123VA310 - JDMuscleOrnaments and EmblemsSUB91123VA300-91123VA310
    Subaru OEM

    STI Special Edition Cherry Blossom STI Side Ornaments

    Fits: 15-21 WRX/STI

    $16773
  • Up to $12 off
    In Stock
    Tomei 06 - 14 WRX / 04 - 21 STI / 05 - 09 LGT Head Gasket 1.2mm Pair | TA4070 - SB02C - JDMuscleHead GasketsTA4070-SB02C
    Tomei

    Head Gasket 1.2mm - Pair

    Fits: 06-14 WRX, 04-21 WRX STI, 05-09 Legacy GT

    Only 5 left
    $10800$120.00 Save $12

  • In Stock
    IAG Performance 02 - 07 WRX / 04 - 21 STI Replacement Blow Off Valve Elbow Black | IAG - ENG - 5012BK - JDMuscleBlow Off Valve FlangesIAG-ENG-5012BK
    IAG Performance

    IAG Replacement Blow Off Valve Elbow - Black

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

    Only 1 left
    $5999

  • In Stock
    Morimoto [15-21 WRX, 15-17 STI, 14-18 Forester, 10-12 Legacy] Type S XB LED Fog Light Kit w/ 5500k White LED
    Morimoto

    Type S XB LED Fog Light Kit w/ 5500k White LED

    Fits: 15-21 WRX, 15-17 STI, 14-18 Forester, 10-12 Legacy

    $16900
  • Up to $8 off
    In Stock
    Turbo XS WRX/STi 3in Downpipe to OEM Cat - Back Adapter w/Standard Exhaust Gasket | ADA - 3DP - OEMCB - JDMuscleExhaust Gaskets and HardwaretxsADA-3DP-OEMCB
    Turbo XS

    WRX/STI 3in Downpipe to OEM Cat-Back Adapter w/Standard Exhaust Gasket

    $4900$57.00 Save 14%
  • Up to $34.48 off
    In Stock
    South Bend Clutch [04 - 21 STI] Stage 2 Daily Clutch Kit w/ Flywheel | FJK1000FW - HD - O - JDMuscleClutchessbcFJK1000FW-HD-O
    South Bend Clutch

    Stage 2 Daily Clutch Kit w/ Flywheel

    Fits: 04-21 WRX STI

    Only 4 left
    $1,11475$1,149.23 Save $34.48
    Pay over time · Est. $34.84/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.