i have a 94 wrx brought the car 6 months ago in standerd form i have now started to extract some more ponies and need some advise. i have changed the tmic for a arc tmic hks panel filter greenwood racing developments decat 3 inch systen aswell as a z4 ecu. i just want to know if i need to be carefull with these kind of mods am i pushing my luck running around in it with out a remap? can i get the z4 remaped? if not wat is the best way foward and wat other mods should i do before getting it mapped im aiming for 300 bhp as i use the car daily.

any info would be nice guys cheers.

 

Z4 needs a remappable daughter board soldered to it like this

http://www.enduringsolutions.com/

Personally i would take the car to a respected rolling road and get them to check the car before you start spending your hard earned on mods.