what is the difference between the heads of an LS1 and a LS6
LS1/ 68cc chambers, oval ports, weaker valvetrain.
Basicaly LS6 flow better,are stronger,and bump your Comp.ratio to 10.5,instead of 10
On stock cube engines, the hp difference is very small, most of the times less than 10hp max. On 382ci or larger engines, the LS6 heads can produce 15-20 rwhp more in most cases.
Tony


