Speed Pro Forged Piston Set - 4.030" Bore - 5/64 x 5/64 x 3/16" Ring Grooves - Plus 5.3 cc - Coated Skirt - SB Chevy (Set of 8) Radio Battery Featuring a 1/2" drive socket

Featuring a 1/2" drive socket and a knurled nut

Features:Red Super Conductor Bulk Wire

(1) Set screws - Allen 1/16"

Race XD lifters for

663 lb/in Spring Rate

Speed Pro Forged Piston Set - 4.030" Bore - 5/64 x 5/64 x 3/16" Ring Grooves - Plus 5.3 cc - Coated Skirt - SB Chevy (Set of 8) Radio Battery Featuring a 1/2" drive socketFully updated skirt profiles Exclusive DUROSHIELD skirt coating. DUROSHIELD provides scuff resistance, reduced bore clearances and enhanced ring sealing. SPEED PRO POWERFORGED pistons are built to stringent specifications with a precision CNC machined dome and skirts and microfinished ring grooves. The manufacturing process ensures that piston weights within a boxed set will not vary more than 4 grams and that skirt sizes are matched to within 0.