I'm new in here and just tring to get some good info without jumping around the net. I am tring to get a few more mpg out of my 5.7 ram and maybe improve towing power. I have a bully dog programmer, a 63 series k&n, and I tb spacer so far. I was looking at either some bbk shorties or gibsons.Good or look for others? Also if I do the headers is it worth doing a true dual exhaust w/cats or could I save my money and just cut my stock muffler out and weld a flowmaster or magnaflow in.

 

first off welcome to the dodge forum second use the search function it will help you out alot 3rd ditch the tb spacer it was a waste of money it does nothing yes a free flowin exhaust will help and maybe even a better programmer alot a guys run a superchips 3815 and touching anything from ur cats and above will void ur warranty so stay cat back good luck on getting more mpg's its hard cause once you start modding its hard to stay out of the gas....

 

4.56 gears, Magnaflow cat-back and Diablosport Predator.

And ditch the TB spacer as mentioned above.