MCS-531930 - The predecessor of the Super E. The E was introduced in 1990 for all-round street use; the B came in 1975 for all out performance and is suitable for engines up to 100". It has the identical 1-7/8" diameter throat but a longer venturi. Perfect for high f

Fitment:
66-E78 Shovel(NU) with O-ring (for L78-84 Shovel add 1X 510565 Adapter rings)