JRM Vortec Heads-1.94/1.6 Valve-.600" Lift single spring-Screw in studs & guide plates
JR Motorsports has expanded our line of JRM Perforance cylinder heads with the addition of assembled Vortec castings. The Vortec head's fasdt burn combustion chamber and high velocity ports combine to produce big horsepower out of the box. Awesome for two barrel engines. Heads are available assembled using brand new, GM castings, or machined OE castings, which are crack checked, magnafluxed, and machined for straightness.
- 64cc combustion chambers
- PRC 4000 series performance stainless steel valves
- Z28 valve springs with spring upgrades available
- New heavy duty retainers, and valve locks
- Spring and valve upgrades are available