All I had done to mine was a resonator delete and steeda tune. Top end wasn't anything you could feel but the 30 to 40 lb ft of torque down low from 2 to 4000 rpm was a big difference. Also throttle response was greatly improved. Hope this helps!
Took mine to a top speed event with the steeda tune and a slight wind from the front! She topped out at 183! I think 185 with no wind at all and steeda tune in place would be doable. The gearing in 5th is not optimized for top end as I had tons of rpm left in 5th when she stopped pulling. Have...
That would be right by the butt dyno! Biggest difference is the torque you pick up below the curve! Throttle response is much better, especially off on throttle through the curves!
They get 60 to 70 more ft lbs of torque between 2 and 3000 rpm. Right where you stay while cruising. Made a huge difference in the way it feels down low. Yes 599 for tune and tuner and the tuner comes blank. If your like me it took a hour to update tuner and pull the strategy codes off the pcm.lol
I just put the steeda tune on mine and you can really tell a difference from 2 to 3000 rpm. Feels like it got a big kick in the tail! Haven't revved her out yet but cant wait to pull 7600 now! Sounds a little deeper now also. Air fuel changed a good deal.