What else can I do?
 

05 Screw, 5.4 V8 with 900 miles...new K&N intake, Gibson dual catback, Hypertech chip tuned....what else can I do to boost performance without voiding the warranty? Also, what are the optimum transmission shift points? I left them at stock when I tuned with the Hypertech, my buddy says to lower 1st by 500, increase 2, 3 and 4 by 500. Any opinions?

Hey JimmyOC, sounds like you got yourself a nice truck. I had the hypertech reprogrammer and got rid of it for a Troyer tuned Excalibrator, it was the best thing I did. Truck acts a lot better. You could always add the E-fans and the underdrive pulleys. I don't know if these would affect your warrany tho. Hope this helps.