FRP 5.7/6.4 CNC Cylinder Heads

As of March 2025- please allow 2-3 weeks for fulfillment if out of stock. Please email info@frptuning.com for availabiity. 

To minimize issues with quality of castings, we will source all cores used in the CNC Program. 

This is for a pair of CNC ported heads, with castings included, complete with reconditioned OE valves and aftermarket springs. We use an aggressive valve job for maximum valve clearance and extra shimming on PSI or PAC springs for max effort setups. We went 11.36@118.5 at 4500 lbs (475 whp Dynojet) in a 8 speed regular cab Ram with these 5.7 heads. 

The 5.7 heads flow ~380 CFM @.650 lift (intake)
6.4 heads flow ~400 cfm @.650 lift (intake).