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Angry Ass | 325X32 4 Piston Front Brake System | Competition

from $3,622.83

Much like our 299 and 310X32 brake systems our 325X32 4 Piston Front Brake System | Competition is designed for customers who want to maximize performance with a period correct looking caliper that fits under period diameter wheels. Unlike those two systems the 325 system moves to a much larger 70 vane 325X32 rotor that most importantly is floating. This increases the systems capability on track for those with significantly more performance all while still fitting under a 16” E28 M5 wheel. With the proven AP Racing CP8350 4 piston caliper paired with the 325X32 70 vane J-hook friction discs that are professionally bedded with Ferodo Racing compounds, you’re ready for the track. 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 slight trimming of the front dust shields. We highly recommend removal of the dust shields all together for best performance.

Brake Pads:

Much like our 299 and 310X32 brake systems our 325X32 4 Piston Front Brake System | Competition is designed for customers who want to maximize performance with a period correct looking caliper that fits under period diameter wheels. Unlike those two systems the 325 system moves to a much larger 70 vane 325X32 rotor that most importantly is floating. This increases the systems capability on track for those with significantly more performance all while still fitting under a 16” E28 M5 wheel. With the proven AP Racing CP8350 4 piston caliper paired with the 325X32 70 vane J-hook friction discs that are professionally bedded with Ferodo Racing compounds, you’re ready for the track. 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 slight trimming of the front dust shields. We highly recommend removal of the dust shields all together for best performance.

Install Directions
Fitment Template
 

Additional Information

Advantages Over OEM Options

  • Assembled 325X32mm 70 vane rotor weighs 16.6lbs and is used for its ideal performance compared to common OEM options:

    • OEM E28 535i 282X25mm rotor weighs 12.8lbs for an increase of 3.8lbs per rotor with increased thermal capacity due to more surface area (vanes and thickness)

    • OEM E28 M5 300X30mm rotor weighs 19lbs for a loss of 2.4lbs per rotor

    • OEM E34 520i, 525i, 525td/s, 530i and 535i 302X22mm rotor weighs 16lbs for an increase of .6lbs per rotor with increased thermal capacity due to more surface area (vanes and thickness)

    • OEM E34 540i 302X28mm rotor weighs 17.8lbs for a loss of 1.2lbs per rotor

    • OEM E35 M5 315X28mm rotor weighs 20.6lbs for a loss of 4.0lbs per rotor

  • Disc metallurgy specifically designed to handle competition duty for long term durability. Mounting hats manufactured from 6061 aluminum and hard anodized to MIL-A-8625 Type III in gray with a laser etched Ass to show proper rotation direction

  • Large curved vane count with superior geometry over pillar type or straight vane OEM designs for increased thermal transfer and disc stability

  • Caliper and mounting bracket with ARP hardware weigh in at 5.7lbs per corner compared to common OEM options:

    • OEM E28 535i sliding caliper assembly at 10lbs for a loss of 4.3lbs per caliper

    • OEM E28 M5 fixed 4 piston caliper at 11lbs for a loss of 5.3lbs per caliper

    • OEM E34 520i, 525i, 530i and 535i sliding caliper assembly at 11.2lbs for a loss of 5.5lbs per caliper

    • OEM E34 540i sliding caliper assembly at 11.2lbs for a loss of 5.5lbs per caliper

    • OEM E34 M5 sliding caliper assembly at 11.3lbs for a loss of 5.6lbs per caliper

  • Piston sizes specifically chosen to closely mimic the OEM brake torque. By doing this our front systems can be bolted up with no negative effects to the OEM ABS system and your vehicles stock master cylinder can remain, as can the OEM rear brake system

  • 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

  • Integrated bleed screw and crossover protection. Prevents accidental damage to your caliper plumbing when removing wheels or from random track debris

  • Spiegler brake lines that reduce compliance of OEM rubber lines

  • Single bolt pad change using commonly available pad shape, 20 mm 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

  • Multiple Ferodo Racing pad compounds available

  • Cost effective lifetime professional caliper rebuild service available through our partner, Essex Parts. Pull them off and send them in for a full cleaning and reconditioning (at a fee)

System Includes

  • AP Racing CP8350 calipers made in UK

  • 6061 Aluminum caliper mounting brackets made in USA by Angry Ass with caliper studs manufactured by ARP to Angry Ass specifications in the USA

  • OEM BMW hardware for mounting caliper mounting bracket to hub

  • Loctite 271

  • USA and UK made M10 K-nuts and washers for securing caliper to caliper bracket

  • Front stainless steel brake lines with banjo bolts and crush rings manufactured by Spiegler to Angry Ass specifications in the USA

  • Ferodo Racing brake pads

  • Brake pad sensor delete assembled by Angry Ass in USA

  • Brake pad tension clips by Essex Parts

  • Left and right AP Racing 310X32mm 60 vane friction discs made in UK and assembled on 6061 aluminum mounting hats made in USA by Angry Ass. Discs are burnished as standard with your choice of Ferodo pads so they’re ready to run at install

  • OEM BMW rotor retaining screws for early and late style hubs

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