I appreciate the answers, but some ov you are not reading. I'm building a SIDE-EXIT exhaust.

I understood, that why I posted I run 3.5 collectors into 4 inch side pipes that exit just in front of the rear wheels.

With the inserts out my wife says she can hear me over a mile away at night where we run and test.

I dont think I have any back pressure in my side pipe setup.

Here its a toss up on weather the po po wants to question the side exit exhaust, but most can be made to be confused enough that they wont write a ticket they are not sure about as long as the violation wasnt noise related.