DOES YOUR LS VALVE SPRING UPGRADE ACTUALLY HURT POWER? WHEN YOU PERFORM A CAM UPGRADE ON YOUR LS, IT USUALLY REQUIRES A VALVE-SPRING UPGRADE. THE QUESTION IS, DOES INCREASING THE VALVE SPRING RATE COST POWER? CHECK OUT THIS TEST COMPARING THE STOCK LS3 VALVE SPRINGS TO A SET OF COMP BEEHIVE 26918 SPRINGS, THEN THE COMP BEEHIVE SPRINGS COMPARED TO A SET OF DUAL, PLATINUM .660 SPRINGS FROM BRIAN TOOLEY RACING. DO STIFFER SPRINGS COST POWER-THE ANSWER IS HERE!

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