$1,141.99
$799.49
Sierra 18-4493 High Performance Cylinder Head 454/7.4L GM Vortex Head Universal GM Casting 12560241, 10141279 100cc Combustion chamber, 246cc Intake runner
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Sierra 18-4485 High Performance Cylinder Head
$1,049.99
$734.99
$315.00
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Sierra 18-4485 High Performance Cylinder Head
- All GM cylinder heads utilize high performance screw-in rocker arm studs
- Cylinder heads are new castings
- Complete assemblies with new stainless steel valves
- Hardened steel exhaust seats, valve springs, valve locks and retainers
- Fits: Vortec GM small block 5.7L high performance
- CH350GA: 5.7L Hybrid Pre-Vortec 217 style casting
- 65cc combustion chamber, 176cc intake runner
- 1.94 intake valve, 1.50 exhaust valve
- TBI/Vortec style bolt pattern/Center bolt valve cover
Note: Replace in pairs
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Other Details
- Google Product Type:
- Engine Parts
- Product MPN:
- 18-4485HP
- Product UPC:
- 808282361808
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