big gun exhaust

anyone used the big gun 1 into 2 into 1 header in there yz 400. I have a chance to get an entire setup, and was wondering what type of power increase it gives you. It sure looks cool.

I baught my 98 yz400 used and it came with this exhaust setup. I don't have anything to compare it to but my bike runs excelent and it sounds really good too. Not to mention how good it looks :ride:

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