Wilwood Big Brake Kit Features:Forged Billet DynaPro 4 Piston Calipers for the MINI Cooper and MINI Cooper S
The DynaPro four-piston radial mount caliper for the MINI or MINI Cooper S is a combination of process and design. The process of stress-flow forging re-aligns the metal's grain structure within the contour of the brake caliper body. This eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block billet. The FEA generated radial transition design eliminates steps and shoulders in the area between the piston housing body and the caliper bridges. Incorporating a radius in this critical area substantially increases resistance to deflection and caliper separation.
The DynaPro uses a new 7816 type brake pad that is supported from the top by Quick-Clip pad retainers. This eliminates the need for a pad support step in the bottom of the caliper, and adds additional clearance for mounting closer to the hub on small wheel and rotor applications. The pad radius matches rotor diameters 9.45" - 12.19", and the caliper fits easily inside many 13" wheel applications. The Quick Clips also accommodate easy pad access without caliper removal. Other features include coated aluminum pistons fitted with high temperature rubber boots that seal out dirt, moisture, and debris from the piston bores. Every caliper is equipped with Wilwood's SRS stainless steel bridge plates. The SRS plates eliminate the bridge wear caused by pad gouging. The spring-loading action of the SRS plates also eliminates pad rattle and dampens the vibration harmonics that contribute to squeal under braking. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws assure simple and effective air evacuation and allow one caliper to be mounted in any front, rear, right or left position.