STM Exhaust Valves (bellows type) for M-series

0neoldfart

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Well, after using the STM replacement exhaust valves on my M1000 for 3 seasons, and also on my wife's M8 for 2 seasons (her sled is newer) - I have the following observations:
1 - they are expensive
2 - they are idiot proof - minimal maintenance, set the spring preload & forget about them.
3 - No more stretched or broken APV cables, no clearance issues with exhaust, no failed servo motors!
4 - Smoother power delivery as valves open progressively with throttle position, instead of at set RPM points (in other words, no bog or hesitation waiting for valve to open.
5 - excellent craftsmanship
6 - lose about 3 lbs of weight

All in all, I would recommend this product to anyone who owns an M-sled. They work as good as or better then the OEM parts, you lose a bit of weight, and increase the reliability of your sled (big plus in the backcountry when you're 70 miles from the truck).:beer::beer:
 
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