Is there a way to install it permanently, so i dont have a wire hanging out of my door? also is it bad to leave it in all the time, is it expected to last for a while, or its just for tuning occasionally? I have the older batch of tuners, its about 2 months old, do i need to update it? I know i have just about the first evo utec, so i need to update that.

 

Yes.. I have the wires run neatly up through the engine compartment through the firewall.. My O2 bung is welded not too far from the O2 housing near the oil pan.. Wiring runs up around the front of the engine, under the A/C line and then finally through the firewall under the dash..