Allstar Performance SB Chevrolet Aluminum Crankshaft Hub AFCO Racing Products The MAC-1X pumper features a

The MAC-1X pumper features a single powerful motor nested within the filter to reduce overall size

1/4 in Mounting Holes

1988-1994 Lincoln Continental

Single speedfit closure locks away Nomex ® ® laces

35-75psi - Includes - Spring

Allstar Performance SB Chevrolet Aluminum Crankshaft Hub AFCO Racing Products The MAC-1X pumper features aDesigned specifically for circle track racers, this SB Chevy aluminum crank hub is NOT a harmonic damper. Hub is significantly lighter than a harmonic balancer and dramatically reduces rotating weight for quicker acceleration off the turn. Hub has engraved timing marks at 0 and from 30 42, is 4 3 8" in diameter, features (3) 3 8" 16 accessory threads and weighs just one pound. Fits all internally balanced small block Chevy engines. Designed for