Here i am again spending more cash after just sorting 1 problem out. Now that i seem to of got remap sorted atlast. my old n75 valve has more rust on it than a skip. so do buy direct replacement or N75J? this bin asked so many times but does anyone here have a 1.8 t aeb WITH n75j on there car. does it increase power or what because cost wise there nothing between the two really? im concerned because i have read that some cars do increase in power but after a bit the ecu adapts and goes back to normal?