hello all

i have a 75 cutlass supreme with 350 motor, looking at summit racing, there isnt much offered for headers but much offered for regular cutlass, what is differenve between regular cutlass and supreme? what is needed to make regular cutlass headers fit a supreme HELP

 

There is no difference. That is an old rumor that won't die.

 

This has been a problem for many years and even after it being pointed out to manufacturers they still refuse to update their tech info. There is no physical difference between any of the Oldsmobile A bodies under the hood.