I'm looking for the stock impeller for the 2004 MSX140, 5132707 to test with. I bought one brandy-new from Billy Womack, and had it tweaked by Impros. But I'm curious if the Impros tweak really does provide any top speed increase. (It was mentioned several times on PWCTurday that 1-2mph could be gained by the tweak, and Impros agreed) I'd really like to get to the bottom of this possible myth!

Anybody got a near perfect one they'd care to sell, or even just loan for a day? I'd pay shipping both ways on the loaner. Prefer to buy, if possible.