Piston, 90mm Flat Top for Predator 420 OHV & GX390
90mm Flat Top for 420cc Predator/GX390
90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420Predators (non-hemi).
GX390s Blocks can be bored to accept this piston
Includes Piston & Rings
( Pin and Clips not included)
Picture for reference only, actual part may be slightly different