Angry Ass | 340X30 4 Piston Front Brake System | Road
Our 340X30 4 Piston Front Brake System | Road features increased thermal capacity, a more performance-oriented bias, and cost-effective and easy to source consumables. This setup adapts OEM BMW 340X30mm lightweight rotors and OEM BMW 4 piston calipers to your E24, E28, E31, E32, or E34. While this is a street focused kit, with proper pads and fluid we have proven its efficacy at HPDE days and autocross events. If you need pads or fluid that perform at a higher level please contact us for assistance.
Base offering consists of hardware for installation and Spiegler braided front lines. Source calipers and rotors on your own or let us help assemble your system. If you’re curious if this system will fit your current wheels download and check with our fitment template found below.
NOTE: When ordering with calipers and rotors a 5-10 day lead time is typical, if longer we will update you by email.
HUB TYPE NOTE: Please check your hubs to confirm hub type, see reference pics in gallery. Earlier cars use a asymmetric hub design for the rotor retention screw vs later cars which use a symmetric hub design for the retention screw. That being said your car may have an updated hub installed as a replacement. The early style hubs require CNC machining of the rotor for use of the retention screw and if an E34 M5 or 850CSi you will require additional machining for the hub dowels, we offer this at no cost when you buy rotors with us.
Additional Information
The only OEM 17” rim that we’ve found to fit is the BMW M-System, which if a E34 fitment still requires a 7mm spacer for adequate spoke to caliper clearance. E31 M-Systems with ET10 offset fit without a spacer. BBS RX203 17” ET10 fit. When in doubt use our fitment template found below.
Style 5, 32 and 19 DO NOT FIT with this system we suggest our smaller diameter offerings if your goal is to use these rims
Pairs well with E34 M5/540i rear brakes (300x20mm vented)
Reuses OEM brake pad wear sensors
MIL-A-8625 Type III hard anodized black 6061 machined spacers. Made in the USA
OEM BMW caliper mounting bolts (longer than stock bolts)
Loctite 243 for caliper bolts
