Originally posted by 02Harley86
I got a question? I am about to install a 6# lower pulley and a 2.80 upper pulley with a custom chip, how much more horsepower would I gain?
Stock you are probably between 315-325HP at the wheels. With the 6# lower and a tune, you should be around 355-370HP. Adding the 2.80 upper sets you up like a lightning using a 6# lower, so probably around 370-385HP I would guess. So figure roughly 60-75HP gain. Every truck is a little different, so you won't know until you do it.
Justin
NHTOC#157 / 03 2-tone #9101
444 RWHP / 527 Ft-lbs TQ SAE