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JR Race Car ZRK-4000

Stage 8 ZR Engine Kit

JR Race Car ZRK-4000


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Estimated ship date 01/25/18 if Ordered Today
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JR Race Car ZRK-4000 Stage 8 ZR Engine Kit $3,163.99
Stage 8 ZR Engine Kit

JR Race Car ZRK-4000 Details

Engine Kits

ZR Stage 8 complete block kit, capable of running 8.50 with a 325-350 lbs package at sea level.
Kit components:

  • ZR3 Billet Block (bore size between 2.994" - 3.032")
  • ZR3 Billet head
  • ZR3 Billet head gasket (0.015. 0.021, 0.027, 0.032, 0.042, 0.060)
  • ZR Billet side cover
  • 2-port ZR Billet breather
  • JR 0.563 stroke Billet crankshaft
  • Hardened crank gear
  • 4.225" Billet connecting rod
  • Dome piston with rings, wrist pin, and clips
  • ZR Billet camshaft (0.473" lift)
  • Dual valve springs
  • 1.500" Stainless steel intake valve
  • 1.250" Stainless steel exhaust valve
  • Multi-angle valve job
  • Full length bronze valve guides
  • CNC ported intake and exhaust ports
  • 27" 3-stage coated header
  • Billet intake (hardware kit included)
  • 33mm Mikuni carburetor with velocity stack
  • Air filter
  • 3˚ Billet adjustable coil bracket
  • JR 3HP hot coil
  • Billet 3HP flywheel
  • Bosch spark plug
  • Grooved billet starter nut
  • Billet fuel pump bracket
  • Walbro fuel pump
  • 10' of fuel line
  • Fuel filter
  • Hardware Kit

  • Specifications:

    Manufacturer's Part Number:

    JR Race Car has an engine for any level of Junior Drag Racing... from the 12.90 Raptor-based motor all the way to Titan 3-3/4" bore motors. Review each engine's specifications to find which one meets your needs. Engine kits also available for Crew Chiefs who like to do their own engines.

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