I was wondering about getting the R4 promeg system from whitebrothers. Any one have the exaust, tested it, heard it???

 

I saw a 400ex with one on it at Tour De Forest this past ride. It looked and sounded great. It seems it's angled at a mildly modified engine. THe guy was running a 440 kit and he blew away a Raptor a few times. It didn't seem as loud as the FMF pipes.