Quote:
Originally Posted by jns_e85
UPDATE!
After doing the mods and installing the tune, all I can say is the change is amazing. I always viewed the Z4M as a sort of "Dr, Jekyll and Mr. Hyde" type of car. It can be civilized when required, but will turn into a beast when necessary. The tune along with the headers and VT engine mounts have made this analogy even more relevant.
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When you did the headers, I'm assuming the "modified section 1" was to install the bungs into the exhaust to install the o2 sensors behind the cats? Or was the tune able to eliminate the rear o2 sensors?
dumb question- did you have to have the car tuned on the dyno, or did you send the ECU to reflash (or something else?).
Does the CAI actually gain any HP?
I think as far as I'd want to take my car would be a tune and euro headers