Hop Up Kits for Kart Racing

Basic Kit for Improving the Performance of GX390s, 420 Predators, 13/15 HP Chinese OHVs. Simple to Install and Provides Significant Performance Increases!

Basic Kit for Improving the Performance of GX270 & 270/301cc OHVs. Simple to Install, You Can Expect Significant Performance Increases!

Basic Kit for Improving the Performance of GX160, GX200s, and Chinese 6.5 Engines. Simple to Install, You Can Expect Significant Performance Increases!

Basic Kit for Improving the Performance of 212 Hemi Predator Engines. Simple to Install, You Can Expect Significant Performance Increases.

Basic Kit for Improving the Performance of 224 Predator Engines. Simple to Install, You Can Expect Significant Performance Increases.

Basic Kit for Improving the Performance of 208 DuroMax Engines. Simple to Install, You Can Expect Significant Performance Increases!

Basic Kit for Improving the Performance of 212 OHV Predators (Old Style). Simple to Install, You Can Expect Significant Performance Increases.

A Step up from the Stage 1, This Kit Is Designed to Improve the Power and Durability of GX340s and GX390s.

A Step up from the Stage 1, This Kit Is Designed to Further Improve the Power of GX240s and GX270s by Adding a Larger Carb and Cam.

Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but Also Includes Bored Carb and Performance Cam to Produce a Solid 10+ HP on GX200s & 6.5 OHVs.

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce in Excess of 12 HP.

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Reach 12+ HP.

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce a Solid 12+ HP on 208s.

For Maximum Performance without Opening up the Case! Same as Our Stage 1 Kit, but with the Addition of a Bored Carb and Performance Cam to Produce 12+ HP.

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, We Add a Racing Camshaft, a 22mm Carburetor, and a Billet Rod. This Kit Produces 13-15HP or More.

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, We Add a Racing Camshaft, a 22mm Carburetor, and a Billet Rod. This Kit Produces 13-15HP or More.

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, This Will Further Empower the 420, Producing up to 20+ HP.

Now You Are Getting Serious! A Step up from Our Stage 2 Kit, This Is Designed to Improve the Power and Durability of GX240s and GX270s.

Now you are getting serious! A step up from our Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 14, depending on cam/carb selected.

As step up from the Stage 1, this kit is designed to improve the power for the GX340s and GX390s along with improving the durability.

Now you are getting serious. A set-up from Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 15 depending on cam/carb selected.

Now you are getting serious. A set-up from Stage 2 kit, we add a cam and a choice of carburetors. A billet rod and all need gaskets are also included. HP will range between 11 and 15 depending on cam/carb selected.

Our Stage 4+ kits allows you to customize a kit for your application. The 4+ kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head, stainless valves, billet rockers, and a serious cam package. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp

Our Stage 4+ kits allows you to customize a kit for your application. The 4+ kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head, stainless valves, billet rockers, and a serious cam package. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp

Our Stage 4+ kits allows you to customize a kit for your application. The 4+ kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head, stainless valves, billet rockers, and a serious cam package. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp

Our Stage 4+ kits allows you to customize a kit for your application. The 4+ kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head, stainless valves, billet rockers, and a serious cam package. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp

Our Stage 4+ kits allows you to customize a kit for your application. The 4+ kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head, stainless valves, billet rockers, and a serious cam package. Options include everything from roller rockers to stroker kits. This kit will allow you to build a motor in excess of 20+ hp

For building a serious a GX270 or301, the 4 kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components.

The Stage 4 kit starts with package similar to that of the stage 3 but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components. This kits allows up to 35+ HP out of a GX390 and 40+ out of 420/440cc engines.

The Stage 4 kit starts with package similar to that of the stage 3 but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components. This kits allows up to 35+ HP out of a GX390 and 40+ out of 420/440cc engines.