Who is using an aftermarket silencer and how do you like it?

I have a friend with a 520 SX and he is planning on doing the airbox mods and getting a new silencer. He is not going for the Big Gun since they only sell the complete system.

Looking for info on Pro Circuit, FMF, Stroker or White Bros. that work with stock headpipe.



I have a Pro Circuit T4 silencer/spark arrestor. It is almost 3 pounds lighter than stock and is not obnoxiously noisy.

I really like it.

I also have the Pro Circuit T-4. It fits great, sheds some excess weight and make some serious horsepower compared to stock.

Combined with some J.D. jetting and some holes in my airbox it turned my 400 SX into a 250 eater!!!!!!!!!!


2001 KTM 400SX #529



I saw the Big Guns on John Dowd's Factory bike at the US OPEN. They are comming out with a "signature pipe" that is a copy of it...sure to be pricey...but race proven.

The T-4 is the one to get of the slip on's. I think it's a great can change it from open MOTO...Sparky...Quiet Sparky..with hand tools! I talked to several guys with'em and they all loved them.


Chris in the Mojave

'01 520 MXC

'01 200 MXC

'02 YZ250P

'01 KX85

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