S/B Chevy adjustable IMCA headers feature a long primary stepped header, 1-5/8" - 1-3/4" S/B Chevy. 3" collector. One 90° turnout and one 60° turnout.
Adjustable length to allow for engine and/or footbox location, as well as power band tuning. Includes gaskets and bolts for headers.
Header Dimension Chart