Iso long tube headers for 90 silverado ss 454 with large oval ports preferably ceramic coated
I’m finishing the install of a pair from JBA. They were not a direct bolt-on affair, I have done some cutting and welding for stuff like oxygen sensor bungs and an EGR port amongst other things, but I knew this was necessary from the start. The part number is 6822s, and I’m putting them on a ‘98 1 ton crew cab with the gen IV big block (D-shaped exhaust ports). I don’t think they are available anymore though.
