I've never been tested I think it is 94DB which I think is slightly quieter than a mouse fart I have a custom made 2 1/2" tip the power is great but is sure is loud my neigbors will not talk to me anymore ha ha any help would be apprciated. RIDE YELLOW AND PROUD

 

There are only two out there. One is the Custom-X-Series II but it has failed the sound test. Peter is working on an improved version for us in the US. They are lucky in the down under they have a 3 meter distance for testing. We need to see if we can change the distance here 20 inches is way too close. Big Gun say that there quite core will due 94 dB's but till somebody get tested in the dunes and reports back will have to take there word on it.
http://www.biggunexhaust.com/ I have seen test on a Big Gun on a 400ex and it did due 94 dB's but I have not seen any test done on a DS650. We as the customer have to stop just only asking how much power does your pipe make. We want to know what is the db rating of your pipe. Then they will start to make them.

 

Ron Wood Racing [(949)645-0393] has an end cap to adapt the 4" Supertrapp discs to their DS exhaust. You can tune it to any noise level required with these.

 

In my experience with the disc type of sparkarrester/end cap, it definately helped the noise level on my Mojave, but even reducing the discs from 9 to 3 didn't change the sound level a whole lot. (It was still very loud, but much improved when compared to an open pipe on my 1987 Mojave.) How is it that the RWR end cap performs so much better than what I have on my Mojave? What DB level does the RWR pipe kit start at, is it just starting at a much lower level than my White Bros. Mega Alloy?