Speed Pro Hypereutectic Piston 4.390" Bore 5/64 x 5/64 x 3/16" Ring Grooves Minus 4.2 cc - Coated Skirt EGLK and distribution of high-performance lubricants

and distribution of high-performance lubricants for engines (two-wheelers

1986-2009 Ford Mustang

Making these the ultimate throttle bodies for ease of installation and tuning

Polaris RZR PRO XP/RZR Turbo R/RZR PRO R

1961-1968 Mercury Colony Park

Speed Pro Hypereutectic Piston 4.390" Bore 5/64 x 5/64 x 3/16" Ring Grooves Minus 4.2 cc - Coated Skirt EGLK and distribution of high-performance lubricantsFord 429, 460 Sophisticated "barrel" profiles help optimize oil wedge between skirt and wall. Piston skirts protected by next gen DUROSHIELD coating. TAC ring groove geometry Weight matched to + 2 grams. Machined valve reliefs and circlip grooves; LR 63 lock rings for floated applicationsFrom pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry leading performance engine