Thinking about the ECU re-programming. I want to know from anyone who has done this, is it worth it? Will it make enough of a difference performance wise?
I have an intake, UDP, HyperGround & Exhaust. Thanks.

 

i have it on my 2003 nissan maxima 6 spd and i felt a difference all i got is cai, exhaust, hyper ground and i beat a 1997 ws6 from a 60mph roll on all the way to 120 and he gave up so i think it did good
but dont take my word for it this is what i think of my upgrade i like it.