PARAGON 4-Piston Rear Big Brake Kit
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PARAGON 4-Piston Rear Big Brake Kit – Subaru WRX / STI (GR/GV/VA)
This Paragon Track Performance rear big brake kit is a complete, pre-assembled rear axle upgrade for the Subaru WRX and WRX STI (GR, GV and VA chassis). Paragon PA025 4-piston calipers and fully floating 2-piece rotors with 48 directional vanes handle high thermal loads, running up to 30% cooler than OEM for consistent rear braking lap after lap.
The kit is offered with 355 x 32mm rotors, a choice of Paragon P2, P3, R5 or R7 pad compounds, and hard anodised or ENP (electroless nickel plated) caliper finishes.
Note: Retains the OEM handbrake / E-brake function. Piston sizing is matched to work with the OEM ABS and master cylinder. Installation by a professional is recommended.
Features
- Paragon PA025 4-piston rear calipers
- Fully floating 2-piece rotors, 355 x 32mm
- 48 directional ventilation vanes, up to 30% cooler than OEM
- Hard anodised rotor hats resist heat, wear and discolouration
- Caliper finish: hard anodised or ENP
- Compatible with OEM ABS and master cylinder
- Retains the OEM handbrake / E-brake function
- Pre-assembled rear axle kit – bolt-on installation
Pairs Well With
- PARAGON 6-Piston Front Big Brake Kit – Subaru WRX / STI (GC/GD/GR/VA)
- PARAGON 4-Piston Front Big Brake Kit – Subaru WRX / STI (GC/GD/GR/VA)
- PARAGON 2-Piece Front Rotors (4-Pot Brembo) – Subaru WRX STI (GDB/GRB/GVB/VAB) / BRZ (tS) – 326 x 30mm
- PARAGON 2-Piece Front Rotors – Subaru WRX STI Spec C Type RA-R / R205 / S206 / S207 (GDB/GRB/GVB) – 340 x 32mm
- PARAGON Titanium Rear Brake Pad Shims – Subaru WRX STI (GDB/GRB/VAB) / PA026 Caliper
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Years | Engine / Notes |
|---|---|---|---|---|
| Subaru | WRX / WRX STI | GR | 2007+ | Rear; retains OEM handbrake |
| Subaru | WRX / WRX STI | GV | 2007+ | Rear; retains OEM handbrake |
| Subaru | WRX / WRX STI | VA | 2007+ | Rear; retains OEM handbrake |
Product
- Brand
- Paragon
- Caliper finish
- Hard anodised or ENP (electroless nickel plated)
- Rotor size
- 355 x 32mm
- Hat finish
- Hard anodised
- Part number(s)
- PBK.04.170.355.320.TL.01.02.Px.R (+ pad code P2 / P3 / R5 / R7; ENP code for ENP-plated calipers)
Details
- Kit type
- Rear big brake kit
- Calipers
- PA025 4-piston
- Rotor construction
- 2-piece fully floating, 48 directional vanes
- Pad compound options
- P2, P3, R5 or R7
- Parking brake
- OEM handbrake / E-brake retained
Contents
- One pair of Paragon PA025 4-piston calipers
- One pair of Paragon 48-vane fully-floating 2-piece rotor assemblies
- Hard anodised 6061-T6 aerospace grade aluminium hats
- Stainless steel bobbins and anti-rattle clips
- One set of Paragon P3 “Street/Track” semi-metallic brake pads
- Manufactured by Winmax Japan
- Other compounds available at additional cost
- One pair of caliper mounting brackets with all necessary hardware
- One pair of Goodridge DOT-approved stainless steel braided brake lines
- One set of caliper anti-rattle clips
- Detailed installation manual
Pad Shape

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