Quick view DynoCams DynoCams, 308 Grind, Welded Lobe GX390 Core Predator 420 13-16 HP Clone This cam is easy on the valve train and has a very wide power band. This cam requires an upgraded spring package, billet rod, and billet flywheel.Engine: 13HP Fits Honda GX390, Predator 420, DuroMax... $139.99 Add to Cart
Quick view DynoCams DynoCams, 275 Grind, Welded Lobe GX390 Core Predator 420 13 HP Clone This cam is to be used in mild modified applications. It will require an upgraded spring package, billet rod, and billet flywheel. Engine: 13HP Fits Honda GX390 SpecsEngine: 390cc OHV Clone... $143.95 Add to Cart
