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  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED
  • GrimmSpeed [02-21 WRX / 04-21 WRX STI] 4-Piston Brake Caliper Kit for 340mm Rotor - Red - JDMuscleCalipersgrmGRM.1170.1.RED

GrimmSpeed

GrimmSpeed

4-Piston Brake Caliper Kit for 340mm Rotor - Red

Fits: 02-21 WRX / 04-21 WRX STI

$1,60800
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GrimmSpeed 4-Piston Brake Caliper Kit for 340mm Rotor - Red
Fits: 02-21 WRX / 04-21 WRX STI

Other calipers for 15-21 WRX

Fitment

Please Note: Fits 2002-2021 Subaru WRX and 2004-2021 Subaru WRX STI (340mm rotor platform). GrimmSpeed 4-piston brake caliper kit, red. Part GRM.1170.1.RED (fitment per retailer listing for the 2002-2021 platform variant; a separate VB 2022+ variant exists and is NOT this product).
  • 2004–2021 Subaru | WRX STI
  • 2002–2021 Subaru | WRX

Description

The GrimmSpeed 4-piston brake caliper kit for 340mm rotors in red, part GRM.1170.1.RED, for the 2002-2021 Subaru WRX and 2004-2021 Subaru WRX STI. Forged 6061-T6 aluminum 2-piece caliper bodies with 44mm primary / 41mm secondary pistons deliver even pad pressure and reduced taper wear — a true fixed-caliper upgrade designed specifically for the Subaru platform, at a price far below a Brembo swap.

  • Forged 6061-T6 aluminum 4-piston fixed calipers, hard anodized, red finish
  • 44mm primary / 41mm secondary pistons — even pad pressure, reduced taper wear
  • Type 3 hard anodized vented pistons for superior thermal management
  • Designed for 340mm rotors; works with commonly available Subaru OEM and STI rotors
  • Vehicle-specific billet 4140 steel caliper brackets — no knuckle swaps or custom adapters
  • Full hardware kit included (bridge bolts, banjo bolts, crush washers, guide pins, springs); compatible with factory brake lines
  • Pad compatibility: FMSI D1001 or D968 (varies by application)
  • Part GRM.1170.1.RED (fitment per retailer listing: 2002-2021 WRX/STI 340mm platform)

Shipping and Delivery

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Warranty and Support

For GrimmSpeed warranty information, contact our support team.

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

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