Just recently got a RJWC exhaust installed on my 950 and fuel tuner from attitude industries and when Im going high rpms and I de accelerate it makes one pop noise and Im just concerned is it normal part of the exhaust or should I be concerned ?I ve never owned a sxs or let alone had a after market exhaust before this is all new to me I also dont lose power or anything it just makes a pop noise like a fire cracker when I let off the pedal at high rpms