14" x 2" Washable Element Extreme Top w/Black Ring Dropped Base Air Cleaner Kit it has a square bore

it has a square bore carb flange instead of a spread bore

Our dual plane big block manifold is now available with rectangular ports

They also offer the potential for improved fuel economy by making the engine more efficient

Speedmaster LS dual 4-barrel

valve stem seals

14" x 2" Washable Element Extreme Top w/Black Ring Dropped Base Air Cleaner Kit it has a square boreSpeedmaster's air cleaners not only look great, they also provide your engine with cleaner air for better performance. They're available in round and oval styles, and you can choose between plain polished, straight ball milled, and flame ball milled finishes.