F8X Rear AP Racing Pro 5000R Caliper Fitting Kit Designed for BMW F80 / F82 / F87 - M2 / M3 / M4 For AP Racing CP9449 Calipers with Renn Stop 380 x 30 mm discs fully floating race discs (or BMW OEM 2NH 380x28 mm discs) Features:CNC machined from billet 6082-T6 aluminiumStainless steel solid thread inserts on all threads for strength and durability Supplied:2x CNC machined brackets for AP Racing CP9449 Calipers4x M12 flanged bolts for hub to bracket mounting - Grade 10.94x M10 Cap head bolts for caliper mounting - Grade 10.91x Bottle of Genuine Loctite 243 (1.8 ml)Basic Installation instructions with torque specs (we recommend professional installation) Disc Options with this kit:1. Renn Stop 380 x 30 mm discHighest thermal and cooling capacity. We think this is the best option, centred about the 2NH offset with integrated handbrake drum.This is the option with the cheapest rotor replacement cost 2. Any aftermarket 2NH disc 3. BMW Stock 2NH 380 x 28 mm discs. This is the cheapest option:Left Disc: 34118072019Right Disc: 34118072020 For the full kit, you will also need:Your choice of rear discsAP Racing Pro 5000 R Calipers - CP9449Rear HEL Braided lines for AP CalipersPads of your choice Individual components made available separately for accessibility, but the full rear kit is available here (with package discount)