I have no need for them anymore i went better when i swapped engines. They came off my 77 K5 complete exhaust from collector. There 2.5" inlet/outlet offset ones.
$75obo for everything...
http://www.summitracing.com/parts/flo-42541/overview/
$75obo for everything...
http://www.summitracing.com/parts/flo-42541/overview/