unsure,
I think I'm gonna go 2 1/4 inch as it will require less customization.

I need a support bracket for my Y-pipe as my exhaust system is moving a tad much since the install.

At the meet I heard a stock SVT exhaust with the Sho-shop resonatnor installed. Guy said it was a magnaflow unit. Sounded good. Nice and deep. They want $90 for it. I figure the Edelbrock will be even better.