ok i have a 40 series flowmasters and there coming out the side before the tire . I'm going to be getting them relocated so they come out the back . How can i make them louder then they are now. Y pipe? ,X pipe? Any one have any ideas

 

high flow cats and headers. and yeah an X pipe will help with the "tumbling" sound of the exhaust.

 

I threw a Dynomax bullet in there and ran duals out the sidess behind the wheels. It is louder than the 40 series and sounds better. I am still waiting to get the muffler to break in a little more. I have it as loud as I legally can without cutting cats so I'm going to leave mine the way it is now. I had the flowmaster kit, but then I cut the muffler out and swapped in a Dynomax bullet and y pipe.