https://www.youtube.com/watch?v=as5qp3G0WCA
Dougs, X pipe, 3" all the way, magnaflows.
In a contest, somebody with a race car or just someone with too much cam will win. So its not really a fair comparison. But Im a big fan of Magnaflows, both from my own personal experience and pretty much every exhaust dyno test ive ever seen.
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1967 Firebird 462 580hp/590ftlbs
1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455
Owner/Creator Catfish Motorsports
https://www.youtube.com/@CatfishMotorsports