Thinking about putting a new exhaust on my truck. Seems most of the cat-back, bolt-on systems come in rear and side exit models. The rear exit model seems (from the images I have seen) to have alot less bending and a shorter run length (due primarily to the lack of bending for side exit). Basic physics tell me that the rear exit system should provide less resistance so that system should see somewhat better performance. Does that make sense? Do the rear exit and side exit models differ in thie regard?

How about the more general question - why is one style better than the other? Thanks.