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... I assume that everyone is unsing the MMX for weight, is there that much of a difference.
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No I don't think it is weight - it is the blind universal acceptance of a high quality solution to our stock problems of driveline vibrations. Research this and you will find it is not only the build quality but the material selection quality as well.
Also, it is not just the driveshaft, but the resonance of the entire driveline that induces the problematic vibrations. It is also why Lincoln changed the design of the driveshaft to a two piece unit in an effort to cancel out unwanted driveline issues. This was a stopgap measure at best since the new design had inherent high speed problems, but the folks at Lincoln held the critical speed high enough to evade problems with most buyers.
I agree $430 may seem to be a lot for a driveshaft - in yesterday's technology - but today it is the going price for a high quality aftermarket replacement for most high performance vehicles. Price the stock unit at your dealer!
I must admit I was skeptical at first, but the more I looked into it the more assured I became. One thing is clear, the difference with the MMx shaft is absolutely amazing IMHO. If you decide to go this way you will have no regrets.
