is your truck an extended cab? definitely get a programmer. do you have pics of the denali front clip on your silverado? i was thinking of doing that to mine

 

I talked w/ Jeff today, & he wants to run down there also. His buddy Jason w/ the SS was down there last Friday, and he was REAL disappointed. After installing long tube headers, a 3200 stall & a catback system he only improved his time by 0.4 secs. He went from a 13.4 to a 13.0. So you weren't alone in your disappointment Friday.

 

yay i hate to see anyone not do what they expect. the more the marrier. the more ideas and people we have the better.give me a call. i sent you my numbers in a private message.

 

you need EDIT. you have done wonderful things to increase flow through your engine, now you need to tune it. do you know if you are getting any knock retard? you may be a bit lean. pull a couple of plugs and check them. ridding your ECM of TQM will help your "fall on it's face" shifts too.