Im not sure exactly, but they have an entire write-up for me at the shop, i just havent gotten around to picking it up yet. I've known the owner of the shop since we were 12 and hes been doing this his whole life. I have a lot of trust in him, I've seen what he can do to an LS engine and I was pretty impressed. His last Integra had a 13 to 1 compression ratio running high 12s in the 1/4. Not too shabby for an all motor 4 cylinder. But I'll put more info up when I get the chance. Thanks for your input.