Product Description
90mm Aftermarket Flat-top Piston for big bore GX390s. Fits stock bore on 420 Predators (non-hemi).
GX390s Blocks can be bored to accept this piston
407cc using stock crank,
433 with +.160 Stroker Cranks,
440cc with .200 Crank
Includes Piston & Rings
( Pin and Clips not included)
Picture for reference only, actual part may be slightly different
Product Videos
Custom Field
In Stock Today 4
Ships in Ships Today