Probe 9.0:1 Lightweight Pistons for '00-04 Focus Zetec/SVT/ST170 - Standard bore

Note: Standard bore pistons. Require new or low mile engine block. About 9.5:1 compression with SVTF head. The top piston ring can be chrome moly or steel. We recommend the steel top ring for any engines planning to run boost 10 psi or higher. Please ask your engine builder to see which one they recommend you to use.

•Forged from premium 2618 aluminum alloy

•CNC Machined side relief with lower support band provides optimal strength for extreme horsepower applications.

•CNC Diamond turned skirts with reduced cylinder contact profiles provide less friction for increased horsepower

•Forced Pin Oiler for increased wrist pin lubrication

•Sold with rings

•40-51 grams lighter than other brands.