Allstar Performance Ring & Pinion GM 7.5" - Ratio: 4.10 AA0112EG2T54 Crank pulley spacers are for

Crank pulley spacers are for small block Chevys

It is preset to run Top Air

Designed for cars with low hood clearance -- Vettes

Made of 1/2" thick steel

Compression Line Fitting End Caps

Allstar Performance Ring & Pinion GM 7.5" - Ratio: 4.10 AA0112EG2T54 Crank pulley spacers are forQuality differential components are suitable for race, street, and off road use. Lapped in matched sets for quiet operation. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over 30 years, customers worldwide have come to rely on the quality, affordable and practical items available from Allstar Performance.