Ok, in my hotrod mag it says..."Flowmaster's hot new 3-inch exhaust system for GM A-body's can deliver gains up to 50 horsepower on performance-modified big & small block equipped vehicles."

Ok to me, 50hp for just new exhaust is just too much. I am thinking that they have like a 1 inch exhaust on like a 502...

Anyone think im wrong?

ill agree a set of headers and 3 inch exaust would make an easy 50 hp over manifoids and 2 inch exaust

yeah i saw some semi mild 71 chevelle and it made 20 hp but he had a 2 1/4 exaust from from the mufflers back.....what the hell do they expect