I just bought a brand new mbrp can for an 05 m7. i had a speedwerx pipe on at first with the stock can and it ran fine. when i put my new mbrp can on, i took my speedwerx pipe off and replaced it with the stock pipe. when i got everything back together i had my stock pipe with my mbrp can. i started my sled then when i went to accelerate it took a lot of rpms to get it to go. then when i tried going fast it just kept bogging out and it was running like crap. i changed my plugs thinking i fouled them but that wasnt it. CAN ANYONE HELP PLEASE??? i dont know what to do?