bedo

Well I think I'm going to get the Magnaflow 3" cat-back for my GTO. the only thing I have a problem with is that at the part where the midpipes connect to the catback, the magnaflow measures out at 2.5". my midpipes are at 3" so it will create a bit of a kickdown.


so its basically

midpipes (3") > connection between mids and catback (2.5") > after collectors and out (3")


would this create a pressure issue? or would I be just fine using it?

I'm not making any serious power, just an air intake and headers, and don't think I will in the future

Gravik

Could always make a custom 3" catback and get 3" magnaflow mufflers.