2015-2021 Subaru STI Parts & Accessories

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  • In Stock
    IAG Stock Location Turbo Oil Feed Line & AVCS Line for Multiple Fitments | IAG - ENG - 2070 - JDMuscleOil Feed Lines and FittingsIAG-ENG-2070Not IncludedNot IncludedNot Included
    IAG Performance

    IAG Stock Location Turbo Oil Feed Line & AVCS Line for Multiple Fitments

    Only 1 left
    From $11999
  • Up to $160 off
    In Stock
    Bilstein [15 - 21 WRX/STI] B6 Front Right Monotube Strut Assembly | 35 - 249474 - JDMuscleStruts And Shocksbil35-249474
    Bilstein

    B6 Front Right Monotube Strut Assembly

    Fits: 15-21 WRX/STI

    Only 2 left
    $32900$489.00 Save $160
    Pay over time · Est. $10.28/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 $157 off
    BLOX Racing [15 - 21 WRX/STI] Plus Series Fully Adjustable Coilovers | BXSS - 00521 - JDMuscleCoiloversbloBXSS-00521
    BLOX Racing

    Plus Series Pro Fully Adjustable Coilovers

    Fits: 15-21 WRX/STI

    $89300$1,050.00 Save $157
    Pay over time · Est. $27.91/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 $83 off
    Rexpeed [15 - 21 WRX/STI] Powder Painting Aesthetics Front Brace Neon Pink | G65 - NP - JDMuscleFrame BracesG65-NP
    Rexpeed

    Powder Painting Aesthetics Front Brace - Neon Pink

    Fits: 15-21 WRX/STI

    Black Friday Deal: Extra 10% Off Code REXPEED10 Ends 2/14
    $16700$250.00 Save $83

  • In Stock
    Cobb Tuning [04 - 20 STI, 02 - 07 WRX, 04 - 08 FXT] 4 Bar MAP Sensor Upgrade Kit - JDMuscleEngine Management SensorscobbA12700
    COBB Tuning

    4-Bar MAP Sensor Kit - Cast Manifold

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

    $23500
    Pay over time · Est. $7.34/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
    COBB Oil Filler Cap Black Most Subaru Models - JDMuscleOil Capscobb800510-BK
    COBB Tuning

    Subaru Oil Cap - Stealth Black

    Fits: 15-26 WRX, 15-21 WRX STI, 13-26 BRZ, 02-14 Impreza, 04-13 Forester XT, 05-12 Legacy GT, 05-09 Outback XT, 20-25 Legacy XT/Sport, 20-26 Outback XT/Wilderness

    Only 6 left
    $9500

  • In Stock
    COBB 15 - 21 STI Front Mount Intercooler Kit Black | SUBFMIC001BK - JDMuscleIntercoolerscobbSUBFMIC001BK
    COBB Tuning

    Front Mount Intercooler Kit - Black

    Fits: 15-21 WRX STI

    Only 5 left
    $2,43500
    Pay over time · Est. $76.09/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 $8 off
    COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 LGT, 07 - 11 FXT] Fuel Injectors Top Feed 1300x - JDMuscleFuel Injectors and Accessoriescobb312230
    COBB Tuning

    1300x² Top-Feed Fuel Injectors

    Fits: 02-14 WRX, 07-21 WRX STI, 05-12 Legacy GT, 06-13 Forester XT

    $95200$960.00 Save $8
    Pay over time · Est. $29.75/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
    COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665
    COBB Tuning

    LF Bypass Valve

    Fits: 02-07 WRX, 04-21 WRX STI, 06-08 FXT

    $37500
    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.

  • In Stock
    COBB [04 - 21 STI, 06 - 09 LGT Spec B] 6 - SpeedShifter Bushing Combo | 21332X - JDMuscleShifter Bushingscobb21332X
    COBB Tuning

    6-Speed Shifter Bushing Pack

    Fits: 04-21 WRX STI, 06-09 Legacy GT Spec B

    $9000

  • In Stock
    COBB [08 - 14 WRX, 08 - 21 STI, 09 - 13 FXT] SF Intake System - Black | 715100 - BK - JDMuscleIntakescobb715100-BK
    COBB Tuning

    SF Intake System - Black

    Fits: 08-14 WRX, 08-21 WRX STI, 09-13 Forester XT

    $34000
    Pay over time · Est. $10.63/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
    Kartboy [15 - 21 WRX/STI] Front Endlinks | KB - 017F - 12MM - JDMuscleEnd LinkskbyKB-017F-12MM
    Kartboy

    Front Endlinks

    Fits: 15-21 WRX/STI

    $14500
  • Up to $39.84 off
    ETS [15-21 WRX/STI] Chassis Support Brace
    Extreme Turbo Systems

    ETS Chassis Support Brace

    Fits: 15-21 WRX/STI

    Black Friday Deal: 16% Off Ends 11/30
    $20916$249.00 Save $39.84
    Pay over time · Est. $6.54/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 $102 off
    Perrin [08-21 WRX, 08-21 STI, 13-23 BRZ, 13-16 FRS, 17-21 GT86, 22-23 GR86] Rear Adjustable Sway Bar 16mm | PSP-SUS-229 - JDMuscleSway BarsperPSP-SUS-229
    Perrin Performance

    Perrin Rear Adjustable Sway Bar - 16mm

    Fits: 08-21 WRX/STI, 13-23 BRZ, 13-16 FR-S, 17-21 GT86, 22-23 GR86

    $17800$280.00 Save $102
  • Up to $9.05 off
    In Stock
    Mishimoto [02-14 WRX, 04-21 STI] Titanium Turbo Blanket - JDMuscleHeat Isolation & Heat WrapmisMMTB-WRX-01
    Mishimoto

    Titanium Turbo Blanket

    Fits: 01-14 WRX, 04-17 WRX STI

    Only 8 left
    $8595$95.00 Save 10%
  • Up to $29.90 off
    SPL Parts 08-21 WRX/STI / 13-21 BRZ Front Bumpsteer Correction Kit | TRE-FRS - JDMuscleTie Rods / Ball JointsSPLsppSPL TRE FRS
    SPL Parts

    Front Bumpsteer Correction Kit

    Fits: 08-21 WRX/WRX STI, 13-21 BRZ

    $26910$299.00 Save $29.90
    Pay over time · Est. $8.41/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.

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.