Its called a flow bench and very common with a performance muffler.... no not a fan dummy.
Dummy..... ouch you cut deep.
How do you imagine this fancy finagled flow bench moves this air? Maybe a fan? I’m clearly not a performance muffler guy so I wouldn’t know.
I guess you’re right. The reason you’re getting waxed by a guy that gives up 60lbs to you isn’t because of the easy bake oven you have strapped to your pipe but more likely grossly inconsistent clutch only on your sled.
Enjoy your garlic shrimp. They’ll help you close that 60lb gap between you and your buddy.