Stage 4 Hop Up Kit for GX200 & 6.5 Chinese OHV
For serious engine builders looking for great power and good reliability, we offer our Stage 4 kit. This package is similar to that of the Stage 3 kit, but adds a ported and milled head, stainless valves, billet rockers, a flat-top piston, and a great all-around cam package.

*Note: This kit will not fit Harbor Freight 212 (Predator) engines. Please see our Predator Kits for those applications. Picture is for reference only. Actual content is based on above description and customer's selections. (In other words, the flywheel shown is optional.) Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included - click here. These kits are intended for experienced engine builders. Some clearance, fitment, or other engine building "tricks" may be needed. Aluminum flywheel REQUIRED. Stock flywheels are prone to failure and are very DANGEROUS.