Allstar Performance Ring & Pinion GM 7.5" - Ratio: 3.42 Bung and Plug Kit Combo arm has a 1"

Combo arm has a 1" lead

With compression-style design

Scoops are molded from durable high-impact plastic with carbon fiber look and have a molded-in flange for easy mounting

These cylinder heads feature a 65cc or 75cc combustion chamber with a 64cc exhaust port and a 3/4'' thick head deck (ideal for nitrous or blower applications)

Allstar Performance Ring & Pinion GM 7.5" - Ratio: 3.42 Bung and Plug Kit Combo arm has a 1"Quality 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.