BORE: 4.166"

THICKNESS: .041"

VOLUME: 9.1CC

Fitment: Gen 1 and Gen 2 SB Chevy engines up to 4.166 bore. This size will cover engines such as the Chevy 350, 355, 383. These gaskets are not for to be used on the 400 engine if your using the steam holes .

**THESE ARE NOT CARDED GASKET'S. WE BUY THEM IN BULK PACKS AND PASS ON THE SAVINGS**