GrimmSpeed 4-Piston Brake Caliper Kit – 340mm Rotor | 2004-2021 Subaru STI (GRM.1170.1)

4-Piston Brake Caliper Kit – 340mm Rotor for 2004-2021 Subaru STI by GrimmSpeed

The stock single-piston caliper found on most Subaru platforms gets the job done but it wasnt designed for the kind of aggressive driving, tracking, or build evolution most GrimmSpeed drivers pursue. Thats where Grimmspeeds 4-Piston Brake Caliper Kit comes in.

Purpose-built for Subaru performance, this fixed caliper setup brings balanced stopping power, improved heat management, and consistent pedal feel to your favorite chassis. Designed in-house and tested under real-world conditions, the system offers a true performance solution with no need to chase down used Brembos or deal with custom brackets.

Features

• Forged 6061-T6 Aluminum Caliper Body
• Dual Piston Setup
• Heat-Managed Pistons

Benefits

• Lightweight Design
• Compatible with FMSI D1001 or D968 pads
• Works with commonly available Subaru OEM and STI rotors

Applications

• 2004-2021 Subaru STI

What’s In The Box?

• (2) GrimmSpeed 4-Piston Brake Calipers (choose Red or Gunmetal)
• (2) Vehicle-Specific Billet 4140 Steel Caliper Brackets
• Full Hardware Kit: Bridge bolts, Banjo bolts, Crush washers, Bleeder dust caps, Caliper guide pins, Security cotter pins, Caliper spring bridges + bolts

References

• Installation Instructions

Warranty

• Limited Manufacturers Warranty