GM Muscle Series Air Cleaner - Satin Black Machined - 120-221 distributors-and-parts APR supplies each unit with

APR supplies each unit with a properly specified spring

9L V8 1980 Pontiac Bonneville   301/4

Manifold has provisions for (1) 3/8 NPT and (2) 1/8 NPT fittings

Detailed instructions are included to guide you through the rebuilding process

Improved design for street/strip applications

GM Muscle Series Air Cleaner - Satin Black Machined - 120-221 distributors-and-parts APR supplies each unit withOverview: Holley's new GM Muscle Series air cleaner kits are the latest expansion to our officially licensed GM product line. These die cast aluminum air cleaner kits were designed to have a no frills, modern style with prominent raised GM "Chevrolet and Bowtie" logos. Intended as an alternative to the existing GM ZZ6 accessories, Holley's GM Muscle Series air cleaner kit can be the perfect addition to your engine bay if you are searching for a subtly