View Full Version : GM MLS gaskets good enough for YSi?

02-14-2007, 10:49 PM
I have searched and researched but don't really know what head gaskets would be best suited to a YSi blower. The motor is 360 ci, 9:1 comp. ARP head studs. I've got Cometics on there now, the heads have to come off to be freshened up though. The Cometics may or may not be usable again. I've got a set of standard GM MLS gaskets, would they be any good?

I don't really know what boost numbers I'll end up with, I have a couple of pullies- 2.95" and 2.75". I may start off with something in the low 3" range though.

Pro Stock John
02-14-2007, 11:22 PM
They worked for me. I ran a 2.85 pulley and was seeing 18psi when I was going 144mph. I have an 8:1 347 ci.

02-14-2007, 11:26 PM
I dont have a YSi but I run 14psi with a big turbo with no prolems with the MLS for almost 2 years now.

02-14-2007, 11:43 PM
Good enough for me. I'll stick with the MLS's. Thanks guys!

02-15-2007, 01:35 PM
MLS fine here too.

02-15-2007, 10:00 PM
No problem here at 14 PSI and getting ready to push them hard without o-rings to 25 PSI.