yz400/yz426 Silencer

I am looking to install a YZ silencer on my 99 WR400. I am wondering if the 426 silencer is the same as the '98/'99 YZ400 silencer?

Somehow I thought I had heard that the exhaust diameter is different on the 426? Does any one know for sure or can confirm different part #'s?



anyone? Has this already been addressed?



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