Of course I installed LT's and 4:10s blah blah blah... just like everyone else the 4:10s made the biggest difference in ET but the headers ehh not so much. So my question is how much of a difference will a tuner tuned by the right guy make in my ET. Keeping in mind I'm lucky to run a 13.9 lately and has never been tuned.
from my experience the shittos need a nice big burnout to stick. lower the tire pressure to around 15 psi in the dr's and jack the air pressure up in the front tires. then tach it up and feather the clutch for best 60 ft.
long as you're not dead hooking the car with a clutch drop then nothing should break.
keep practicing and you should be able to get deeper into the 13s