Quote:
Originally Posted by 08stroker250
Your not going to get any whistle with a 6.4, just a heads up. Its more of a rush of air. Spartan is the BEST when it comes to tranny tuning. I dont know any daily drivers that have the Spartan with tranny issues. I am not trying to sell you on anything, I am just letting you know that Spartan really is the best proven tuner for the 6.4 at the moment  |
i get a a little whistle with mine especially when i let out of the throttle
its nothin like a 6.0 but i can definately hear it.