I have the PV2 on my VX. It is welded on to the factory exhaust using reducers. It is louder than the first version, so loud I had the exhaust shop weld on a plain old 2" tailpipe in place if my stock 3" tip. Made a tremendous difference in noise reduction without sacrificing the mellow tone. It does sound awsome. I noticed a bit more throttle response and definately increased my MPG by about 2 miles per gallon mainly noticeable on the highway. (probably because I got my foot in it all the time around town)