Read lots of threads and it seems the gm headgaskets are the best bang for the buck, just gathering the last pieces to the puzzle for my heads/cam swap.

What is the difference between the two? They look the same in the pictures, but one is twice the price.



SBE LS1, milled .0015" and ported 243 heads, BTR stage 3 cam, arp studs. Will see a 100-150 shot regularly.. Which gasket is better for this application? Thanks all.