Hey guys l have a 99 z24 l picked up for the wife and I've been fixing it a little for her!! l'm looking for someone with a HPT Tuner in the Toronto area to help tune the car so far l have a Injen intake, Magnaflow highflow cat and muffler and gonna be putting a header in the next year... I've been reading the forums and come across people tuning there cars with the same kind of setup and others saying not even to bother. Cause you wont see a difference? Any info would be great thanks??