Has anyone done it? Is fitment exact? Thanks in advance for any help.
Yes it will work. I used a 02 WR 426 exhuast on my 01 YZ 426 with no problems. But, I have already passed it on to another person though because I was using it as a cheap way to pass sound checks but in all honesty the WR was 1-2 dB louder than the stock can with a fresh packing complete.
yep! it will.
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