Live in Vegas and gotta take my truck through emissions in Phoenix. I am going to bring the CAT with me just in case. I am running 5" right now so not sure if it will be possible to rig up a quick change out....
2005 GMC LLY CCSB
S&B intake, AFE mouthpiece, 5" MBRP, Edge Insight CTS w/pyrometer and Boost sensor, EFI Live (PPEI DSP5 via CTS), Inland Empire Carrier Bearing, AD II 165, 3" DP, 3" IC Pipe, SDP EGR Delete, PCV Rerouted, SS brake lines, Chrome RBP 94Rs 20x9, Toyo 305/55/20s, Cognito NTBD Lift with UCAs, Bilstein 5100s, Cognito HD Tie Rods, Amsoil By-pass
Alpine INA-W900BT, DDM 6000K HIDs