Wilwood Superlite Internal 4 Caliper- LH - 1.88" / 1.75" Pistons - .810" Rotor - 3.5" Mount Royal Purple Metal Canister Is Filled With

Metal Canister Is Filled With A Premium Grade Oil For Cooling

4340 steel or titanium

00 in Overall Height

Grade 8 Header Bolts are heat-treated with black oxide finish

Wilwood Superlite Internal 4 Caliper- LH - 1.88" / 1.75" Pistons - .810" Rotor - 3.5" Mount Royal Purple Metal Canister Is Filled WithFSLI4 and FSLI4 ST calipers provide the pad wear performance advantages of differential bore pistons with the option for ultimate heat protection using Thermlock pistons in the ST models. Differential piston bores compensate for leading edge mechanical loading and temperature variances across the pad face to reduce pad taper wear in sustained high temperature applications. Thermlock pistons in the ST models block heat transfer from the pads and reduce