Need some help before my money bruns a hole in my pocket. Have a 2001 1.8t AUM (150) also with a stage 1 cc remap and i want to take the CAT out. All i want to know is......... 1 is it werth it? 2 I have a CAT back system by taking that out will it make it any louder? 3 will it bring any fault codes up? 4 How meany Lamba probes do i have?