I own a 2001 mustang bullitt. I already have a upr o/r xpipe installed with an slp lm1 cat back. This however is way to loud. Im am looking into getting either the slp power-flow or the slp lm2. I still want to have that crackling sound but I want the car to be quite a bit quieter. I just want to know if anyone else has the same problem with the loudness of the lm1 with the xpipe or if anyone has the lm2 or power-flow and how those two sound with an o/r xpipe. Also will the slp power-flows still have the crackling sound?

