Description
4500 Carburetor Base Gasket. Made in the USA by JB Performance.
- 1/8″ thick. Thicker than most gaskets to minimize heat absorption into carb.
- Bolt pattern: 5.375″ x 5.375″
- Open center.
- 4 barrel Dominator style.
- Part number 130178
Also fits B&M, Holley, and Weiand 177 Superchargers, Mercruiser 525SC.

Impeller nut- clockwise thread
B&M, Holley, Weiand Front Gear Cover G1- Polished
Front gear case cover 100AX. W3A, 140AX, 175AX, 140R
Powerdyne input shaft and cog assembly
JB Performance Powerdyne Volute Case Clamp
Weiand, Holley, B&M drive snout spring 841270 / 6998, G2 drives
8 bolt Carb/Lid gasket 