2015-2021 Subaru STI Parts & Accessories

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  • In Stock
    Rally Armor Black Mud Flap Grey Logo WRX/STI Sedan 15-21
    Rally Armor

    Black UR Mud Flap w/Grey Logo

    Fits: 15-21 WRX/STI

    Only 8 left
    $19050
  • Up to $160 off
    Perrin 02-14 WRX / 04-21 STI / 05-09 LGT Air Oil Separator Neon Yellow w/ FMIC | PSP-ENG-607NY
    Perrin Performance

    Perrin Air Oil Separator Neon Yellow w/ FMIC

    Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 05-09 OBXT

    $41200$572.00 Save $160
    Pay over time · Est. $12.88/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 $29.80 off
    In Stock
    Perrin [15-21 WRX/STI] Rear Window Vents | PSP-BDY-503
    Perrin Performance

    Perrin Rear Window Vents - Final Sale

    Fits: 15-21 WRX/STI

    Black Friday Deal: 20% Off Ends 1/4
    $11920$149.00 Save $29.80
  • APR 15-17 WRX/STI Carbon Fiber Front Wind Splitter w/ Factory Lip | CW-801508
    APR Performance

    Carbon Fiber Front Wind Splitter (OEM Lip)

    Fits: 15-17 WRX/STI

    $59900
    Pay over time · Est. $18.72/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.
  • APR 15-17 WRX/STI Carbon Fiber Brake Ducts | CF-801550
    APR Performance

    Carbon Fiber Brake Ducts

    Fits: 15-17 WRX/STI

    $61500
    Pay over time · Est. $19.22/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.
  • Air Lift Performance Front and Rear Kit WRX/STI 15-21
    Air Lift Performance

    Front and Rear Air Suspension Kit

    Fits: 15-21 WRX/STI

    $2,22590
    Pay over time · Est. $69.56/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 $154 off
    BLOX Racing 13-21 BRZ/ 08-21 WRX/STI Rear Lower Control Arms | BXSS-50010-BL
    BLOX Racing

    Rear Lower Control Arms Blue

    Fits: 08-19 WRX/STI, 13-20 BRZ/86

    $26100$415.00 Save $154
    Pay over time · Est. $8.16/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 $30 off
    In Stock
    Seibon 15-21 WRX/STI Carbon Fiber Rear Fin Garnish | RG15SBIMP
    Seibon

    Carbon Fiber Rear Fin Garnish

    Fits: 15-21 WRX/STI

    Only 5 left
    $27000$300.00 Save $30
    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.
  • Up to $14.99 off
    In Stock
    Torque Solution Solid Shifter Linkage U-Joint Subaru STI 2006-2021
    Torque Solution

    Solid Shifter Linkage U-Joint

    Fits: 04-21 WRX STI

    $8500$99.99 Save 15%
  • Up to $89.40 off
    Invidia Uppipe No EGT Bung WRX 02-14 / STI 04-21 | HS06SW1UPP
    Invidia

    Uppipe No EGT Bung

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

    $31100$400.40 Save $89.40
    Pay over time · Est. $9.72/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 $438.18 off
    In Stock
    Invidia [15-21 WRX/STI] Racing Series Cat Back Exhaust Titanium Tip | HS15SW4GST
    Invidia

    Invidia

    Fits: 15-21 WRX

    Only 6 left
    $81300$1,251.18 Save $438.18
    Pay over time · Est. $25.41/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.
  • Up to $30.20 off
    In Stock
    Invidia 3in Downpipe to 2.5in Exhaust Adapter WRX/STI 2008+ / Forester 2004-2010 | HS02SWIAPD
    Invidia

    3in Downpipe to 2.5in Exhaust Adapter

    Fits: 08-21 WRX/WRX STI, 04-10 Forester

    Only 10 left
    $5800$88.20 Save 34%
  • Up to $21 off
    In Stock
    Perrin [18-21 WRX/STI, 13-16 FR-S, 13-20 BRZ, 17-20 86] License Plate Holder | PSP-BDY-205
    Perrin Performance

    Perrin License Plate Holder

    Fits: 18-21 WRX/STI, 13-16 FR-S, 13-20 BRZ, 17-20 86

    Black Friday Deal: 20% Off Ends 1/4
    $8400$105.00 Save $21
  • Up to $32.80 off
    In Stock
    Perrin 15-21 WRX/STI Master Cylinder Brace Black | PSP-BRK-403BK
    Perrin Performance

    Perrin Master Cylinder Brace Black

    Fits: 15-21 WRX/STI

    Only 14 left
    Black Friday Deal: 20% Off Ends 1/4
    $13120$164.00 Save $32.80
  • Up to $3.80 off
    In Stock
    Perrin 15-21 WRX/STI Firewall Grommet | ASM-GAU-120
    Perrin Performance

    Perrin Firewall Grommet

    Fits: 15-21 WRX/STI

    Black Friday Deal: 20% Off Ends 1/4
    $1520$19.00 Save 20%
  • Up to $8.80 off
    In Stock
    Perrin 02-07 WRX / 04-21 STI Throttle Body Hose Black | PSP-ITR-301BK
    Perrin Performance

    Perrin Throttle Body Hose Black

    Fits: 02-07 WRX, 04-21 STI

    Black Friday Deal: 20% Off Ends 1/4
    $3520$44.00 Save 20%

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.