i got a 04 sup cab with the 5.4 im thinking of doing two high flow cats x piped with some bullets and dumped after the back axle. Any advice on this set up would be greatly appreciated. Also could anyone tell the best places to buy these parts. thanks in advance

 

performance peddler, summit racing, ebay, amazon, etc. theres plenty of vendors out there, just look for the lowest prices and customer service, which is usually summit racing.

 

thanks what do yall think of this setup. right now im just running a single flowmaster. im wanting something louder.

 

You will love, as long as you don't dump it. If you must, make sure to add a 3.5" tip on the end of your "dump". This will add the depth back in your sound.

 

Delete your rear cats, run 2.5" true duals X'd with Bullets. It sounds awesome.