I recently replaced the OEM exhaust on my 2003 LT with 60K with a Remus Street Can due to the fact that the OEM had a hole that had rusted thru. I also inserted the pipe in the end to cut down on the drone. When I ride the twisties I always stay in low gear with high RPMs to take advantage of engine braking. Now I get a lot of popping and an occasional backfire when doing that. I changed to premium grade fuel and was considering a RhineWest chip thinking that would solve my problems. After doing a bit of searching on the forum it appears that the RhineWest chip won't really cure my issue. I don't mind spending the money if it will cure my issue but don't want to spend the money if I still have the issue. Any other ideas?