i got a ultraflow muffler that i got from summit its a universal for camaros and firebirds,thats what they said,i got it put on yesterday and the guy at the muffler shop said he didnt see how it was going too flow through with the way it was designed he seemed to think that the exhaust was only going to come out oneside but got it don and started it up and it came out both sides,but it seems it comes out the drivers side more than the passenger is this supposed to flow like this?

 

Thats why the Ultra Flo is a non traditional crossflow since it is designed like it is. Under 50% to WOT 95% of the exhaust will come out of the drivers side outlet only.

What people don't understand is that is how the Flowmaster is also under 80% to WOT though.