Wilwood Caliper-Forged Superlite 4-ST 1.88/1.75in Pistons 1.25in Disc 2003-bmw-m3-esi5615045 79 Rotor) - Black

79 Rotor) - Black

The Turbosmart GenV RacePort Blow Off Valve Diaphragm Piston is designed to provide consistent valve operation

Heat-treated forging for strength and toughness

Your vehicle's factory fuel pump wiring may not be adequate enough to handle the current draw of AEM's High Flow Fuel Pumps

Capable of withstanding temperatures in excess of 2500°F Fits up to 6 in

Wilwood Caliper-Forged Superlite 4-ST 1.88/1.75in Pistons 1.25in Disc 2003-bmw-m3-esi5615045 79 Rotor) - BlackFSLI4 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