Frenkit Performance Brake Caliper Seal Rebuild Kit
Not sure which option fits your application? Contact Us — we're happy to help.
Frenkit Performance Brake Caliper Seal Rebuild Kit - Subaru WRX STI (GD/GG/GR) / Mitsubishi Evo (CP9A/CT9A/CZ4A) - Front Brembo
This Frenkit Performance seal kit rebuilds one front Brembo 4-pot caliper with 40mm and 46mm pistons, as fitted to the Subaru WRX STI (GD/GG and GR hatch) and Mitsubishi Lancer Evolution V to X (CP9A/CT9A/CZ4A). Heat-resistant silicone boots suit cars that see track days or hard road driving.
Frenkit Performance kits use grey high-temperature silicone dust boots and bleeder caps that stay flexible through repeated heat cycles, where standard rubber can harden and crack. Frenkit rates the silicone for continuous use from -60°C to +200°C, and each kit includes a caliper temperature sticker so you can see how hot the caliper has run.
It replaces Mitsubishi 4605A571 / MR407375 and Subaru 26297FE010.
Note: This kit services one caliper; order two for a pair. Suits the Brembo front caliper only, not the Sumitomo or Tokico calipers on non-STI WRX models. Installation by a professional is recommended.
Features
- Grey high-temperature silicone dust boots and bleeder caps
- Pressure seals for both piston sizes
- Crossover port o-rings and caliper temperature sticker included
- Suits track days and hard road driving
Pairs Well With
- Frenkit Performance Brake Caliper Rebuild Kit - Subaru WRX STI (GD/GR) / Mitsubishi Lancer Evo (CP9A/CT9A/CZ4A) - Front Brembo 40/46mm
- Frenkit Brake Caliper Pins & Clips Kit - Subaru WRX/STI (GDB/GRB) / Mitsubishi Evo (CP9A/CT9A) - Front Brembo
- Frenkit Brake Pad Shim Kit - Subaru WRX STI (GD/GR) / Mitsubishi Evo (CP9A/CT9A/CZ4A) - Front Brembo 4-Pot
Need help choosing the right kit for your calipers? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Mitsubishi | Lancer Evolution IV | CN9A | 4G63 |
| Mitsubishi | Lancer Evolution V | CP9A | 4G63 |
| Mitsubishi | Lancer Evolution VI | CP9A | 4G63 |
| Mitsubishi | Lancer Evolution VII | CT9A | 4G63 |
| Mitsubishi | Lancer Evolution VIII | CT9A | 4G63 |
| Mitsubishi | Lancer Evolution IX | CT9A | 4G63 |
| Subaru | Impreza WRX STI | GDB | EJ207 |
| Subaru | Impreza WRX STI | GRB | EJ207 |
Product
- Brand
- Frenkit
- Part number(s)
- 664004
Details
- Product
- Performance brake caliper seal rebuild kit
- Axle
- Front
- Caliper
- Brembo 4-pot
- Piston diameters
- 40mm and 46mm
- Contents
- 4 pressure seals, 4 silicone dust boots, 2 crossover o-rings, 2 silicone bleeder caps, temperature sticker
- Material
- Grey high-temperature silicone dust boots and bleeder caps (-60°C to +200°C continuous)
- Kit covers
- One caliper
- Replaces
- Mitsubishi 4605A571, MR407375; Subaru 26297FE010
Contents
- 2 x 40mm pressure seal
- 2 x 40mm high-temperature silicone dust boot
- 2 x 46mm pressure seal
- 2 x 46mm high-temperature silicone dust boot
- 2 x caliper crossover port o-ring
- 2 x high-temperature silicone bleeder cap
- 1 x caliper temperature sticker
No instructions available for this product.

Need Help Finding the Right Part?
We’ll Track It Down for You
We know how frustrating it can be searching for the right part. If it’s not listed on our site, that doesn’t mean we can’t source it.
Fill out the quick form below and our team will track it down for you.

