Originally Posted by Rockford
It's only 2.5" inch, but I don't think that's a restriction until you're well into stage 3. (I'm a mild stage 3, ~280 HP at the wheels.)
I also run the Borla, it's very good, quiet and well made... 333WHP now with no issues from restrictive flow. It's fine for mew and shouldn't be a concern when I add Meth either, I'd be very disappointed if it does...
channoff... direct bolt on.