I was looking for a slip-on to put on my 1999 400ex. I need one to not be too loud. Which slip on is the quietest? I was looking into the big gun, e-series, and the procircuit t4. Which one of these would be the quietest?
Thanks

 

Buy the March issue of Dirt wheels and there is answers to every question you will have on 400ex slip-ons, they did a comparison test. I believe the Big-Gun quiet was the quietest of all but the E-series was only 1bd more and out performed it by a decent margin. I have the E-series and it is still pretty loud, and if the BG is only 1 less, I am sure it is still pretty loud too.