Join Date: Jan 2019
Location: Sedgwick, Kansas
With unequal length manifolds or shorties, it's not like it matters whether he's running 2 1/4" or 5". There's not going to be any scavenging to speak of, and he won't be restricted by the exhaust pipe or mufflers.
However, with a good set of Tri-Y or full length headers, 2 1/4" would make a difference. So would 2", but they'd hurt the top end unless it's basically stock. Tuned exhaust IS a thing. =)
"No matter what you are, be the best one you can." -Abraham Lincoln