IK 180 Series Cylinder Heads
• 180cc Intake Ports
• 70cc Combustion Chambers
• 2.020'' Intake / 1.600'' Exhaust Valve Sizes
• Straight Plug
• Bare, 2/pkg.
  
  

  This head is sold as an unassembled bare casting. It is finished machined and includes valve guides and valve seats installed. This head does NOT include studs, valves, springs retainers or locks.

  Cylinder Head Specifications
• Intake Port Volume: 180cc
• Combustion Chamber Volume: 70cc
• Valve Sizes: 2.020' Intake / 1.600' Exhaust ( 11/32' Stem Diameter )
• Spark Plug Configuration: Straight
  Facts and Related Components
• Torque Heads: 70 ft-lb.
• Torque Rocker Studs: 40-45 ft-lb.
• Intake Gasket: Fel-Pro p/n 375-1204, Cometic p/n 245-C5416
• Head Gasket: Fel-Pro p/n 375-1003 (350ci) / 375-1004 (400ci) or Cometic p/n 245-C5399 (350ci) / 245-C5403 (400ci)
• Exhaust Gasket: Fel-Pro p/n 375-1404 or Cometic p/n 245-C5415
• Head Bolts: ARP p/n 070-134-3601 or Manley p/n 660-42313
• Head Bolt Washers: MANLEY p/n 660-42102
• Head Studs: ARP p/n 070-134-4001 (6-point)
• Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
• Valve Angle: 23°
• Angle Milling: .0078' per cc
• Flat Milling: .0060' per cc
• Pushrod Slots: Standard
• Stud Girdle: Standard
• Rocker Arms: Standard
• Lifters: Standard
• Exhaust Pattern: Standard
• Valve Centerline: Standard
• Spring Pockets: May not be cut any larger or deeper than 1.550'
• Accessory Bolt Holes are Drilled
• Recommended Intake Manifold: Brodix HP-1 (p/n 158-HP1) / HV 1016 (p/n 158-1016)

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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