Thinking about long tracking the 01 700 Formula, any suggestions as to where to get the tunnel extension kit from? Any tips or opinions one way or the other?

Thanks.

I just long tracked my XC 800. I purchased the 136" extension kit from TracksUSA.com with the 8" kit. The fit is PERFECT!!! They are the most rugged extensions I have seen yet. Make sure when your shopping you pay attention to the style of the extensions, some of them like SLP only extend the rear axle back, where TracksUSA extends the entire rail system. To explain, the SLP doesn't have any pressure on the track for the last 7" or 8" near the rear axle because it's just a piece of aluminium plate that extends the axle back. TracksUSA's kit extends the entire rail from sliders to top. Also, the tunnel extention piece is cut and clean. Hope I helped, good luck, and you won't be sorry!!!!

Yup, I've heard good about tracksusa, and they're pretty cheap