I'm installing an exhaust tip on OE pipe. What size is the pipe? Any recomendations on tips? Thx

3.5" pipe..
Tips..Check out the supporting vendors :)

Might want to consider upgrading the entire exhaust. Your truck will benefit from it greatly in the long run. Lower EGT's and better power. Good luck

Yeah stock exhaust is a piece of junk, for 4-800 bucks you can get a quality aftermarket system. If your just going to get a tip, get a slash cut 4 or 5 inch, if your going to do it this way...you might consider straight piping it.