How does the SUpertrapp silencer perform on the 400ex. And can u tell a diffrence tell me everything u know thanks

 

I have a suppertrapp ids on my 99 400ex and i have played around with the amount of discs to put in the tail and i have found that for racing
running no discs has produced the most power. contrary to what some people say that you need some back presure to produce power well not on this machine. i run a 155 main jet and have a KN filter on with the james lucky adapter plate to eliminate the air box and for it being bone stock motor wise its very powerful. I recommend it highly for a stock motor setup. It is race proven for me i was getting consistant 2 places against 250r's and lt 250s last race season.