396 454 427 Big Block Cam Lifter Kit Chev (dyno Proven Over 550hp On Pump Gas)

  

ALSO INCLUDED ARE THE ONLY LIFTERS YOU CAN COUNT ON IN 2022 TO NOT FAIL AS GENUINE GM HARDED FACE/FOOT LIFTERS THAT HAVE THE CORRECT HARDNESS AND SHAPE TO BREAK-IN PROPERLY AND LAST. THIS CAMSHAFT IS A MODIFED VERSION OF THE 450HP GM LS6 CAM ALSO USED IN L78 AND L89 AND L72 425HP ENGINES. IT IS OPTIMIZED AND MODIFED TO USE THE GM RELIABLE HYDRAULIC LIFTERS.

THIS CAM WILL RUN ON ANY VALVE SPRING WITH 90-160 LBS SEAT PRESSURE AND 275-350LBS OPEN PRESSURE ALLOWING FOR LIFT WITH STOCK 1.7 ROCKER. DURING TESTING IN JUNE 2022 ON OUR SUPERFLOW DYNO WE MADE OVER 580HP WITH AN L78 780CFM HOLLEY CARBURETOR ON A GM 425HP WINTERS ALUMINUM INTAKE AT 9.75:1 COMPRESSION ON PUMP GAS ON THIS COMBINATION WITH GM IRON HEADS. THIS CAM IS DESIGN ALSO TO HAVE THE SAME AGRESSIVE SOUND OF THE SOLID LIFTER L78 /L89 OR LS6 450HP CHEVELLE CAM, EVEN WITH MAINTANENCE FREE HYDRAILIC LIFTERS. ALL OTHER MODEL YEARS THIS IS DROP IN CAMSHAFT. THIS CAM HAS A TREMEDOUS AMOUNT OF PISTON TO VALVE CLEARANCE ALSO WHICH MAKES IT EVEN BETTER. WE HAVE DYNO VIDEO AVAILABLE FOR IDLE SOUND OF THIS CAM IF REQUESTED. WE ARE FULL ENGINE MACHINE SHOP AND DYNO FACILITY WITH MORE THEN 25 YEARS EXPERIENCE. CAM IS MADE IN USA, LIFTERS ARE GENUINE GM.