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Hop Up Kit, 420 Hemi, Stage 4
Hop Up Kit, 420 Hemi, Stage 4

Our Price: $968.00

Stock Status:In Stock

Part #: STAGE4KIT420-H

Select Carburator

None (Customer to Supply Carb)
34mm Round Slide Mikuni - Gas [+$183]
34mm Flat Slide Mikuni, Gas [+$211]
33mm Mikuni Pumper, Gas [+$315]
33mm Mikuni Pumper, Methanol [+$422]
Select Flywheel

Add Aluminum Flywheel - Recoil Start [+$166]
Add Aluminum Flywheel - Electric Start [+$211]

Description -
Stage 4 Hop Up Kit for 420 Hemi
The 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:
  • Fully Ported HEMI Race Head
  • High Flow 40mm / 34mm Valves with Lash Caps
  • Dual Springs with Titanium Retainers
  • 307 Race Cam
  • Shaft Mounted Roller Rockers
  • Chrome Moly Pushrods
  • Choice of Carbs (Or use your own)
  • Forged Flat-Top Piston with Rings
  • Billet Rod (+.040" Longer)
  • Offset Timing Key
  • Carb, Insulator, Head, Valve Cover, and Case Gaskets
  • ARP Bolt Kit

*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.

Due to the head work required for this kit, please allow 1 week to ship.

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