Cylinder Head, LH, for 1990 ZR-1 LT5.   This is a RECONDITIONED cylinder head with numbers matching cam cover [#7651] & [#6235].  

Includes the following:

• 24 Jerrys Gaskets PN 10135851, Cam Cover Bolt Dowty Seals
•   4 Jerrys Gaskets PN 10110931, Cam RR Brng Hole 40mm Plugs
• 24 Used, original, 8mm Torx Cam Cover Bolts
•   3 Used, original, 6mm Torx Cam Cover Bolts
•   1 Jerrys Gaskets PN 10135879 Cam Cover PCV Vent Filter

 Reconditioning:

• Cleaning
• Inspection
• Check flatness, mill cut to true as required
• Verify all oil passages are clear
• Inspect valve seats, replace as required
• Inspect valves, replace as required
• Inspect valve springs, height & pressure, replace as required to meet original specs
• Inspect spring retainers, keys & spreing seats, replace as required
• Inspect valve guides for wear, replace as required with new, OEM guides
• 1990 Cylinder heads receive new exhaust valve guides for valve stem seals
• Install new Jerrys Gaskets PN 10067412 Valve Stem Seals
• Inspect all threads for cam covers & exhaust manifolds, chase or repair with heli-coil
• Inspect cam journal bearing surfaces for servicability
• Perform multi-angle valve job
• Check final valve stem height for lifter compression of 0.060"  at cam base circle
• If disassembled, Secondary Port Throttle Valves reassembled w/Loctite 262 on valve screws
• Install new Cam Cover PCV Vent Filter