Let me comment on this one. My stock VX was the guinea pig for the development of the PV catback system. Dyno tested before and after, there was a marked addition of power as the PV Web site shows. I could even feel it in the driving. Our stock muffler is VERY restrictive in allowing the engine to breathe as I am told. Power Vault adds power, the engine works better, and the sound is low and aggressive sounding without being overly so... IMHO.

Email Tone... he knows the specs and could answer any questions you have. Plus he is the distributor.. even better.