427 ALL ALUMINUM LS3 / LSX PUMP GAS ENGINE (WOW 730+HP WITH 700+ FT LB TORQUE!)

CNC PORTED LS3 RACE HEADS UTILIZING SPECIAL PAC VALVE SPRINGS, TITANIUM RETAINERS, HOLLOW 88 GRAM INTAKE VALVE AND SEVERE DUTY EXHAUST VALVES. AFTER THE CNC PORT WORK ALLOWING THESE HEADS TO FLOW EFFICIENTLY TO OVER. 800 VALVE LIFT, THE PORTS WERE SMOOTHED AND HAND POLISHED WITH HAND PORT TOOLS TO REMOVE GHOST SHADOWS LEFT BY CNC TOOLING AND OTHER IMPERFECTIONS ALONG WITH DEVELOPING THE CORRECT SURFACE FINISH ON BOTH THE INTAKE AND EXHAUST PORTS–VERY SMOOTH ON EXHAUST AND A ROUGHER FINISH ON INTAKE PORTS FOR BETTER FUEL AMORTIZATION.