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My brother runs them on his cobra build. They are nice pieces just not so sure I need them.I have been revving to 7k rpm on the same motor build since 2009, never had an issue. As with anything else from MMR, I'd consider it with a healthy dose of skepticism.
The tensioner side does see a larger load than the stationary side. My guide broke because I used the wrong oil filter.Good point. I would think the tensioner side sees most the load though.