I did the Stillen UD and have no problems to report after 3,000 miles. I did take mine to a shop to make sure it was installed correctly and torque specs were proper.
Faster rev and acceleration was much better. Took a lot less throttle and that was before I was UpRev tuned.
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2009 Nismo 370Z and 1975 Datsun 280Z 2+2 - PNW_INC - Legacy_Ohana
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