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I have a 2007 silverado 4.8l I'm wanting to get my truck in the high 13seconds I have a cold air intake, flow master exhaust ,diablo tuner, vet servo,and a 100 shot of nitrous any advice is much appreciated

Get a torque converter

thanks for the advice
what should i go with a yank torque converter and what stall do you think?

tq converter would knock a lot of et also works best with a bigger cam..OR a 6.0 swap :lol:

yea if i had the money i fersure would but im on a little budget here im basically looking for something around $500 that will give me some noticable gains for right now. i mean that 100 shot is real nice haha but i want more i could up the jets to a 125 150 or a 200 but im to scared i think ill leave it at 100 for now

stall is what you need. it knocks 0.3-0.5 easy, that is on fbody not sure how well it will perform on a 4.8 truck