Angry Ass | 355X32 6 Piston Front Brake System | Competition
Our 355X32 6 Piston Front Brake System | Competition is designed for customers who want a competition ready front brake system, which also fits under 17” wheels. This system uses AP Racing CP9660 Radi-Cal 6 piston calipers and 355X32 72 vane J-hook friction discs which are the same caliper and disc type combo found in big brake kits offered for the most modern and advanced vehicles, from F80 M3s to 991 GT3s. If you have any questions or need any help with assembling your system please get in touch.
NOTE: Kits are assembled upon order which can add 5-10 days to your order, if longer we will update you by email.
ATTENTION: Installation requires removal of the front dust shields, which is only possible via cutting or removal of the front bearing, which then necessitates a replacement bearing!
Additional Information
Reduces ~12lbs of unsprung weight with ~6lbs being rotating vs the 315X28 OEM single piston sliding setup
Reduces ~17lbs of unsprung weight with ~5lbs being rotating vs the 345X32 OEM 4 piston fixed Setup
Asymmetric two piece drop forged caliper body optimized for the dynamic forces experienced during braking
Caliper and all aluminum hardware is hard anodized to handle elevated temps
Ventilated and domed back stainless steel pistons to keep heat out of your brake fluid and ensure a stiff pedal
4lb Anti-knockback springs on pistons
Internal crossovers (which means no external crossover pipes to damage or leak)
Two bolt pad change using commonly available pad shape, 18mm thick. No need to remove caliper to change pads
High temperature, low drag piston seals designed to handle track duty
No dust boots - no risk of melting
Disc metallurgy specifically designed to handle competition duty for long term durability
Cost effective lifetime professional caliper rebuild service available through our partner. Pull them off and send them in for a full cleaning and reconditioning
For more information see AP Racing Radi-Cal story
System includes
Left and right AP Racing CP9660 calipers made in UK
Left and right 6061 aluminum caliper mounting brackets with custom caliper studs and M12 K-nuts made in USA
OEM BMW hardware for mounting caliper mounting bracket to hub
Front stainless steel brake lines manufactured by Spiegler to Angry Ass specifications in the USA with banjo bolts and crush rings
Left and right AP Racing 355X32 72 vane friction discs assembled on 6061 aluminum mounting hats with anti-knockback/rattle springs. Friction discs made in UK and mounting hats made in USA. Mounting hats are drilled to account for regular E34 (no hub pins) and M5 (hub pins and retention screw locations)
OEM BMW rotor retaining screws
Loctite 243
We highly recommend using AP Racing Radi-Cal Brake Fluids, Ferodo pads and having your pads bedded in by us so your rotors are ready to use
If interested in a bit less NVH from the pads moving we recommend the anti rattle blocks
