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The Leader in GX Honda & Chinese OHV Performance
The leader in GX Honda & Chinese OHV Performance
Basic Kit for Improving the Performance of GX390s, 420 Predators, 13/15 HP Chinese OHVs. Simple to Install and Provides Significant Performance Increases!
A Step up from the Stage 1, This Kit Is Designed to Improve the Power and Durability of GX340s and GX390s.
Now You Are Getting Serious! A Step up from Our Stage 2 Kit, This Will Further Empower the 420, Producing up to 20+ HP.
A Step up from the Stage 2, This Kit Is Designed to Improve the Power for GX340s and GX390s along with Improving the Durability.
Similar to our Stage 3 Kit, but Adds a Ported and Milled Head with Stainless Valves, a Stud Kit, & HD Valve Train Components. This Kits Allows up to 35+ HP.
Similar to That of the Stage 3, but Adds a Ported and Milled Head with Stainless Valves, a Stud Kit, and HD Valve Train Components. Allows up to 35+ HP from a 420 Engine.
Similar to That of the Stage 3, but Adds a Ported and Milled Head with Stainless Valves, a Stud Kit, and HD Valve Train Components. Allows up to 35+ HP Out of a GX390 Engine.
Stage 4 Kit for 440 Duromax, featuring everything from a Ported and Milled Head with Stainless Valves, Stud Kit, and HD Valve Train Components. Allows up to 35+ HP from a 440 Engine.
Stage 4 Kit for 460cc 92mm 10-Bolt Engines, featuring everything from a Ported and Milled Head with Stainless Valves, Stud Kit, and HD Valve Train Components. Allows up to 40 HP from a 460 Engine.
