How much will a trango shift kit improve my e.t times on my 99 ws6? My mods are only magnaflow catback, slp lid, and k & n air filter. Also, would you use a shift kit and torque converter at the same time? Will the shift kit make my car shift HARD or is that the TC? thanks

 

Well a shift kit wont really affect your ET much . Its job is more along the lines of increasing trans life and improving shift feel, You will get the ET improvement from the TC,and yes a shift kit will make your trans shift much firmer,

 

I ran .4 faster consistantly with a transgo shift kit and TM delete.
Same mods as you at the time, except an SLP exhaust.