Frenkit Caliper Rebuild Kits for Subaru WRX / STI

Frenkit produces caliper rebuild kits matched to the two caliper families Subaru has used across the WRX and STI range: Sumitomo units on GC, GD and GE cars, and Brembo units on GDB, GRB and VA models. Kits in this collection cover front and rear seal sets, guide pin kits, pins and clips kits and brake pad shim kits, with pistons included on some part numbers. Many listings also cover shared calipers on Nissan 200SX and Skyline, Mitsubishi Lancer Evolution, BRZ/86 and Brembo-equipped BMW and Honda models.

Shop by Product Type

Sumitomo front and rear caliper seal rebuild kits (GC / GD / GE)
Brembo front caliper rebuild kits (GDB / GRB, 4-piston)
Brembo rear 36mm gold caliper rebuild kits (GD / GG / GDB / GGB)
Front and rear caliper kits for VA WRX/STI, Forester, Liberty GT and BRZ/86
Brake caliper guide pin kits
Brake caliper pins and clips kits
Brake pad shim kits

Browse the full brand range on the Frenkit brake and clutch repair collection, or see every brand we carry on our brands page.

Choosing the Right Part

Match by caliper type and chassis code rather than model year alone. GC8 and GD WRX generally run Sumitomo 4-piston front and Sumitomo rear calipers, shared with Nissan 200SX (S13/S14/S15) and Skyline (R32/R33/R34). GDB and GRB STI run Brembo front 4-piston calipers, shared with several Lancer Evolution models (CN9A/CP9A/CT9A), and Brembo gold 36mm rear calipers on GD/GG/GDB/GGB cars. VA WRX/STI, along with Forester, Liberty GT and BRZ/86, use another caliper family again, so check the casting and piston diameter stamped or measured on your caliper before ordering.

Kit contents vary: some Frenkit kits are seals and dust boots only, while others include pistons, guide pins or clips. The individual product listing states what is included. Imported and mixed-spec cars are common in Australia, so confirming the caliper on the car is the most reliable approach.

Installation & What You'll Need

Rebuilding a caliper involves removing the pistons cleanly, inspecting and cleaning the bore, fitting new seals without twisting or nicking them, and bleeding the brake system afterwards. Typical requirements include fresh brake fluid, brake cleaner, a clean workspace, a piston removal method suited to your caliper and a torque wrench for reassembly. Brakes are a safety-critical system, and installation by a professional is recommended.

FAQ

How do I know whether I need Sumitomo or Brembo seals?
GC, GD and GE WRX typically run Sumitomo calipers, while GDB and GRB STI and VA WRX/STI run Brembo. Identify the caliper by its casting and piston size rather than by model year alone.

Does a Frenkit rebuild kit include new pistons?
Some kits include pistons and guide pins, while others are seals and dust boots only. Check the individual product listing for the exact contents before ordering.

Can I use these kits on a JDM-spec WRX or STI?
Most kits cover both Australian-delivered and imported calipers within the same caliper family, so match the part to the caliper casting fitted to your car.

Why rebuild rather than replace a caliper?
Seals harden over time and can cause pistons to stick, which may show up as uneven pad wear or a pedal that feels soft. A rebuild kit restores the seals and boots without replacing the complete caliper.

Need help choosing? Contact our team at sales@chicaneaustralia.com.au.