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Hop Up Kit- 212 Predator Hemi, Stage 4
Hop Up Kit- 212 Predator Hemi, Stage 4

Our Price: $659.99

Stock Status:In Stock

Select Valve & Spring Combination

28mm Intake, 25mm Exhaust (Hemi) (+.070"), 37 lb Springs, Aluminum Retainers
28mm Intake, 25mm Exhaust (Hemi) (+.230"), Dual Springs, Aluminum Retainers [+$12]
28mm Intake, 25mm Exhaust (Hemi) (+.230"), Dual Springs, Titanium Retainers [+$27]
Select Piston/Rings

Wiseco Forged, 2-Ring (adds long rod) [+$106]
Wiseco Forged, 3-Ring (adds long rod) [+$112]
Select Carburator

22mm Mikuni - Gas
28mm Flat Slide Mikuni - Methanol [+$106]
28mm Gas Black Round Slide [+$65]
24mm Flat Slide Mikuni - Gas [+$79]
Select Compression Ratio

10.5 to 1
11 to 1
12 to 1
13 to 1
Crankshaft Type/Options

No Crankshaft
.060 Stroker, Honda Core, Balanced [+$267]
.175 Billet Stroker (includes Wiseco Piston) [+$495]
.060 Stroker Predator Crankshaft (Balanced ) [+$190]
Select Camshaft

252 0207 (very small oval 6500 rpm)
274 0207 (small Oval, 7500 rpm)
274 0607 (large oval 8000+ rpm)
274 1007 (1/4 mile tracks, 9500 Rpm)
280 0611 (Snow Mobile, Mini Bikes)
307 0807 (Drag Race Only)
Select Flywheel

ARC Billet Aluminum (6626) [+$92]
Billet Aluminum with Digital (PVL) Ignition [+$111]
Dyno PVL (Cast) Aluminum Flywheel [+$60]
Super Light, ARC 6602 & Small Fan (use stock key) [+$113]
Additional Options

Add Aluminum Roller Rockers (spacer included) [+$45]

Description -

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.


  • Race/Open Air Filter & Adapter
  • 22mm Mikuni Carb Kit (other carbs optional)
  • Ported & Milled Hemi Head
  • Oversize Stainless Valves
  • 1.2 Roller Rocker Arms (steel body)
  • Chrome Moly Pushrods
  • Stud Kit
  • 26 lb Springs,
  • Lash Laps
  • 8 degree Timing Key,
  • Gasket Kit
  • Billet Rod
  • Choice of Compression Ratios - Compression ratios based on Flat-Top piston. If a Dished piston is used, deduct approx 1.5 points,
  • Choice of Cams
  • Optional Long Rod
  • Optional Roller Rockers
  • Optional Flywheels
  • Optional Crankshaft
  • Optional Stroker Kit

Picture is for reference only!!! Actual content based on above description and selections. In other words, the flywheel shown is optional!!

Due to the head work involved in these kits, Allow 1 week to ship.

Note: Hemi Kits do not included Valve Cover. Order Separate.

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. Hemis may need pistons notched for valve clearance. Compression rations are estimates and may vary due to deck height and crankshaft tolerances.

Aluminum flywheel recommended. Stock flywheels are prone to failure and very DANGEROUS

Picture for Reference only. Actual Kit may differ and includes Hemi style Head

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