I have a stage 4 GTM.
It works great.
Shifts way quicker than a stock unit.
the improvement in the 4th to 5th shift time is a big improvement .
But remember its built for a 650 hp motor. and tuned for one.
It may not work on a stock engine,
Z
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12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.
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