I modded my mongoose in the end to quiet it down and now have a evo 8 hks super dragger silencer coming out the n/s of the back bumper at a funky angle.
Looks proper chaved up now:lol::lol::der:but i helps quiet it down,plus you can get a bung to make it even quieter.
Not keen on the suit case style silencers you can get for the R as they look restrictive to me?