We installed this exact kit on my friends truck. It was a bit tight, we had to squish the pipe under the cab, just a little though, this is on a SCLB though, not sure what you have. There was even enough room to keep the spare in place. You can't go wrong with 5", it is a very sweet sound. Only complaint I have about it is too much turbo whistle, I deleted my EBPV though and that made it even more noticable. My truck almost sounds like a 6 leaker now, not that that is a terrible thing.