Brawler LS3 Style CNC Ported Cylinder Heads w/ TSP .660″ Spring Kit and Titanium Retainers

If you are looking for a great replacement/upgraded LS3-style cylinder head, look no further than these fully CNC ported Brawler cylinder heads! These are inspired from a factory GM LS3 cylinder head casting but with our tried and true CNC porting program. Equipped with our Stainless Steel valves and TSP/PAC Dual .660 Spring kit with Titanium Retainers, this new cylinder head option provides maximum value for customers wanting to upgrade from stock cylinder heads on a budget. Features:   Same CNC Porting As GM PRC Ported LS3 Heads (257cc Intake port) CNC 5-Angle Valve Job Approx 71cc Combustion Chamber TSP/PAC .660 Spring Kit TSP Titanium Retainers TSP Stainless Steel Valves 2.165″ Hollow Stem intake, 1.60″ stainless exhaust Fully Assembled and Tested   Dyno Tested 25 HP Gains Over Stock 6.2L Cylinder Heads! PRC LS3 Intake  PRC LS3 Exhaust  .200  154 cfm  115 cfm  .300  223 cfm  170 cfm  .400  282 cfm  198 cfm  .500  324 cfm  211 cfm  .600  351 cfm  228 cfm  .650  358 cfm  232 cfm