550 hp 454 gen6 marine mangus mercury racing mercruiser

Description

454 gen-6 big block chevy no core charge! . 4 bolt main block forged chevy crank and rods forged pistons hyd. roller cam heavy duty valve train roller rockers arp studs big rec. port heads alum. Single plenum intake all new valve train . included are valve covers pan balancer and flywheel. these motors dyno at 570 tourque and 550 hp. depending on carb . These motors have very good low speed manners , dock very well and run good we have sold a lot of these and are proven to be a very well engineered combination.