MustangWorks.com : Ford Forums - View Single Post - buying cometics, need to know bore size??

Jeff Chambers · 07-25-2005, 08:09 AM

You'd be a 4.040" bore like 'roddin says. They have a 4.090" gasket, but it's not very popular so its not in stock often. So your next choice is the 4.100" which I'd recommend for the 308. After that, its 4.155" which you'll loose even more compression with if you use. If the Cometics aren't in stock, check Mr. Gasket. They're the Cometics, just re-packaged. BTW: Good choice. Since I started using the Cometics, I haven't had a single head gasket failure. Best thing since sliced bread (or R-blocks)!

07-25-2005, 08:09 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: buying cometics, need to know bore size?? You'd be a 4.040" bore like 'roddin says. They have a 4.090" gasket, but it's not very popular so its not in stock often. So your next choice is the 4.100" which I'd recommend for the 308. After that, its 4.155" which you'll loose even more compression with if you use. If the Cometics aren't in stock, check Mr. Gasket. They're the Cometics, just re-packaged. BTW: Good choice. Since I started using the Cometics, I haven't had a single head gasket failure. Best thing since sliced bread (or R-blocks)! __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"