why does it make your truck feel so much more powerful, i just got min in today, rode in my buddys with the same mods and his feels like a bomb,!

 

it keeps fuel going in the injectors longer ...fuel drop off with the stock spring is around 2200 +- rpm the 366 spring will make it pull to 3000 and you notice it not falling on its face . it also makes the rpm range longer ...more fun to drive

 

what he said... more useable rpm, stronger pull in higher rpm no defueling

 

Hope to find out for myself this weekend...as if installing an intercooler, building tubes for it, and tackling the kdp werent enough jobs, im adding the 3200 spring and a timing bump on top of it all, all while building a heat shield for my stacks.