08-07 exhaust to fit 06 WR?

Would 08-07 WR/YZF aluminum frame 450 exhaust fit on a 06 steel framed WR? In the june issue of Motocross action, page 159, someone writes in about swapping a steel YZF frame for a Aluminum, they say it can be done and the ONLY exhaust mod they list is a aluminum spacer. SO...?

If you have one sitting there, go for it. I don't think I'd buy one. I bought a stock 05 YZ muffler for my 05 WR and couldn't be happier. lnuss is the dude that had it on Ebay. He said he had some more of them. 2003 - 2005 450 YZ mufflers fit the 450 WR's with steal frames.

Not so sure if the YZF aluminun frame exhaust will fit a steel frame WRF. The sub-frame is different and the mounting points.

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