Designed to fit most tube chassis cars with big block Chevy 4.840" bore spacing 5/16" stainless steel flanges 2-1/4” to 2-3/8” step primary tube size option comes with 3-1/2” to 4-1/2”...
Big Block Chevy 4.840” bore center Mild Steel 3/8” thick flanges Primary tube size 2-1/4” and 2-3/8” or 2-3/8” and 2-1/2” available Megaphone merge collectors 3-1/2” to 4-1/2” X 14-1/2” Long ...