1 7/8" x 3" Mild Steel Long Tube HeadersFor use with 3" inline bolt pattern and raised port height on 351 with 9.5 deckMust be used with Motor Mounts, Power Master Starter #9503, and Team Z K-MemberMay work with other K-Members but may require modificationsDue to the design of this product some applications may require the use of a Flaming River Steering ShaftGaskets and all installation hardware includedThese products are NOT legal for sale, installation, or use on a licensed vehicle in the state of California, and they do NOT meet CARB compliance