Stage 4 Hop Up Kit for 420 HemiThe Stage 4 kit starts with a package similar to that of the
Stage 3, but adds a ported and milled hemi head with stainless valves, a stud kit, and heavy duty valve train components. This kit allows up to 35+ HP out of a 420!
Kit Includes: *Note: Picture is for reference only and may show optional parts. See above description for actual content. 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 clearancing, fitment, or other engine building "tricks" may be needed. Billet aluminum flywheel required.
