ZR4 Engine Kit
• 3-1/2" Bore
  
  ZR4 3 1/2" complete engine kit, capable of going 7.90 with a 450-480 lb package at sea level.
  Kit components:
• ZR4 Billet Block (sleeved, bored and honed)
• ZR4 Billet head with o-ring stud kit
• ZR4 Billet head gasket (0.015, 0.021, 0.027, 0.032, 0.042, 0.060)
• ZR Billet side cover with hardware kit
• ZR4 Billet breather with hardware kit
• JRC 0.563 stroke Billet crankshaft with 1" journal
• Hardened crank gear with key
• Crank bearings
• Crank seals
• JRC 4.375" Billet connecting rod
• JRC piston with rings, 0.590 wrist pin, and clips
• ZR4 Billet camshaft (0.509" lift)
• Cam bearings
• 5/16" diameter lifters
• Dual valve springs
• Titanium intake and exhaust valves
• Multi-angle valve job
• Valve seats
• Full length bronze valve guides
• CNC ported intake and exhaust ports
• 27" 3-stage coated header
• Large port billet intake with hardware kit
• 42mm Carb boot
• 42mm Mikuni carburetor with velocity stack
• JRC Billet carb top and lever arm
• Air filter
• 3° Billet adjustable coil bracket
• JRC 3HP hot coil
• JRC billet 3HP flywheel
• Bosch spark plug
• Grooved billet starter nut
• Billet fuel pump bracket
• Walbro fuel pump
• 10' of fuel line
• Fuel filter
• Billet oil plug
• Oil drain kit
• Hardware Kit

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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