Brand New
$84.95
Availability: In stock
Piston Kit – Flat Top 90mm 420 Predator Pistion (great upgrade for GX390)
Complete kit with rings and Piston.
GX390s Blocks can be bored to accept this piston
407cc using stock crank,
433 with +.160 Stroker Cranks,
440cc with .200 Crank
Brand New & Unopened Condition.
No dimensions information available.
Loading help topics…
We're putting the finishing touches on our new site. The crew is working hard to get everything race-ready.
Have a peek through the window — but the gates aren't open just yet!