The NEW TRIPLE roller option with a 1.25 diameter roller creates a very consistent smooth up shift and back shift with improved roller wear. This latest design creates a huge improvement in engine braking compared to our dual roller Tuner. All billet construction capable of using compression springs with different spring rate options.
Can be used along with the stock primary or the STM primary. Best results are acquired when running both the STM primary and STM tuner together.
