Quick view ARC Racing (2) Pack of GX240/GX390/Predator 420 Heavy Duty 50# Valve Springs 2 Pack of Heavy Duty Valve Springs for Honda GX240, GX270, GX340, & GX390.Approx 50 lbs at 1.125 installed height, 42lbs at 1.2, with 110 lb open pressure (.375 lift). $12.99 Add to Cart
SPECIAL ORDER: 10+ Quick view 250 "Twister" Performance Cam, GX270/GX390s & 301/420 Predators The "Twister" is a High-performance grind providing significant power increase over the stock cam at a great price. Developed on the dyno and the track to maximize power on GX270s, GX390s, 301-420... $74.99 Add to Cart
Quick view DynoCams DynoCams 308 Grind, Welded Lobe Cam, Fits GX390, Predator 420 13-16HP 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... $149.25 $148.95 Add to Cart
Quick view OMB Warehouse Klotz Assembly Lube TechniPlate synthetic Assembly Lube provides needed lubrication during the critical first moments an engine runs. $12.95 Add to Cart
SPECIAL ORDER: 10+ Quick view DynoCams DynoCams 275 Grind, Welded Lobe 13HP Cam, Fits GX390, Predator 420 13-16HP 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... $215.00 $149.00 Add to Cart
SPECIAL ORDER: 10+ Quick view DynoCams DynoCams 356 Grind, Welded Lobe Cam, Fits GX390 Predator 420 13-16HP Clone The DynoCams 356 is a high lift modified grind that is very capable of extreme RPMs. This cam has very aggressive ramps and requires an upgraded spring package, billet rod, and billet flywheel. For... $149.25 $148.95 Add to Cart
SPECIAL ORDER: 10+ Quick view DynoCams DynoCams 356 Grind, Tool Steel Billet Cam, Fits GX390 Predator 420 13-16HP Clone The DynoCams 356 is a high lift modified grind that is very capable of extreme RPMs. This cam has very aggressive ramps and requires an upgraded spring package, billet rod, and billet flywheel. For... $215.00 $214.95 Add to Cart
SPECIAL ORDER: 10+ Quick view DynoCams DynoCams MOD1, Welded Lobe 13 HP Cam, Fits GX390, Predator 420, 13-16HP Clone This cam makes slightly more top end power than the 308 grind. This cam requires an upgraded spring package, billet rod, and billet flywheel.Engine: 13HP Fits Honda GX390 SpecsEngine: 390cc OHV Clone... $149.25 $148.95 Add to Cart
SPECIAL ORDER: 10+ Quick view OMB 54# Valve Springs Pair GX240/270/390 Predator 420 Severe Duty Valve Springs - Pair Fits Honda GX 240, 270, 340, and 390, Predator 301/420 (Hemi and non-Hemi heads), and most 13-16 HP Clone engines Made of high-quality alloyApproximately 54lb at 1... $29.14 $27.99 Add to Cart
SPECIAL ORDER: 10+ Quick view PREDATOR 420 DynoCams MOD 2 Grind, Welded Lobe Cam, Fits GX390, Predator 420 13-16HP Clone DescriptionRequires an upgraded spring package, billet rod, and flywheel. It's also a great cheater stock cam if there are no duration checks.The lobes are hardened for extra durability, extending... $149.25 $148.95 Add to Cart
