*** IN STOCK SHIPS TODAY *** B&M 420 Mega blower supercharger base gasket. We have found this gasket to be very durable and is made from a material that allows the gasket to be used time and time again as it tends not to stick or tear upon supercharger removal.
Bolt pattern is 16.00" by 6.750" and blower opening is 13.00" by 3.250".