Crossover Kit - Big Block Chevy Port Inlet without Bypass 

Complete Marine Cooling Crossover Kit - Big Block Chevy Port Inlet without Bypass

Big Block Chevy Port Inlet without Bypass By removing that power robbing engine mounted circulating pump you can experience horsepower gains of up to 15 horsepower while increasing water circulation.  These kits come complete with all necessary bolts, gaskets, and hardware.  Note: Bypass systems use a thermostat while non-bypass doesn't.