I have the Banks 4" and would probably go elsewhere were I to do it again...

 

I ran flo-pro on my last truck (4 inch) without a muffler and it was an easy install and good price and still looked good over a year later before the wreck. My current truck has mbrp but it was on there when i bought it, if it wasnt i would have gone flo-pro for the price and quality

 

I ran expandits on a few trucks. Cheap never had any issues. Got em from Luke on here good helpful guy. I loved the straight 5" on my last one. Got the straight 4" with 5" tip now.

 

we sale primarily nothing but flo-pro. ive installed, them all besides diamond eye. ive got expandit on my truck, put silverline, mbrp, magnaflow on customers truck. flo-pro is deff the easiest and most accurate fitting that ive seen. and they use a band clamp style instead of a u bolt that u will never be able to remove with out cutting the pipe.