doesnt sound like a complete bolt on. you need the connecting pipes with the muffler for it to be a bolt on. cutting your OEM connecting pipe means you will need to weld them to the muffler, same goes for the x-pipe just and x-pipe without the primary cat delete will need some cutting and welding. having just and x-pipe without a primary cat delete usually doesnt cause a CEL.
ESS | Challenge x-pipe | Akrapovic | Stoptech BBK (380/355) |Ohlins R&T | Dinan | Vorsteiner | Downforce USA | Varis Diffuser | Gintani | UUC | BMW Performance | Macht Schnell | Forgestar F14's SDC 19x9.5F 19x11R | 255.35 295.30