Billet Superlite 4 Lug Mount-ST
The billet SL4/ST caliper incorporates Wilwood's latest technology in a conventional 3.50" centered lug mount design, with weights starting at 4.94 pounds. This caliper series has been structurally designed for high clamping efficiency and low deflection in a body width compatible with all wide 5 and 5 x 5 style hubs. It is a direct replacement for all other Superlite style calipers.
For the ultimate protection in extreme sustained high heat competition, SL4/ST models are equipped with Wilwood's exclusive Thermlock® pistons. This multi-part piston assembly provides a highly effective thermal barrier that reduces heat transfer from the pads to the fluid, seals, and caliper body by as much as 30%. Seal life and fluid performance is increased proportionately. High temperature square faced seals provide the largest possible sealing surface area with controlled piston retraction on release.
Every SL4/ST caliper incorporates new and adapted performance features from other Wilwood designs. Each caliper is equipped with replaceable SRS stainless steel bridge wear plates. SRS plates eliminate the bridge wear caused by pad gouging to extend the service life of the caliper. The spring-loaded action of the SRS plates eliminates pad rattle and dampens the vibration harmonics that contribute to pad squeal. The bodies are machined with recesses to protect the fluid crossover tubes and bleed screws. The fluid tubes are dampen mounted and two piece bleed screw assemblies assure reliability in harsh conditions and round out the total performance package. The full range of Wilwood brake pad compounds is available in the 7420 type pads to match the brake response and heat range of any competition application.