ARP 435-3606 Head Bolt Kit for Chevrolet Big Block Mark IV block with Brodix-2. -4. Canfield aluminum and World Products aluminum heads. hex ymm_47 000˝ Thread Size 3/8-16 washers

000˝ Thread Size 3/8-16 washers included

which perfectly combines with the deep sound in the lower range to provide an aural experience in the cabin with no drone and a sound that lingers long after the throttle is released

Specifications Socket Size(s) 7/16 hex Pro Series 200

This system fits also on vehicles equipped with Otto particulate filter (OPF)

ARP 435-3606 Head Bolt Kit for Chevrolet Big Block Mark IV block with Brodix-2. -4. Canfield aluminum and World Products aluminum heads. hex ymm_47 000˝ Thread Size 3/8-16 washersChevrolet Big Block Mark IV block with Brodix 2, 4, Canfield aluminum and World Products aluminum heads, hex Specifications Socket Size(s) 1 2 12pt Fits Following Engines: Chevrolet Big Block Mark IV block with Brodix 2, 4