Im going to put a decat on my 2003 wrx ppp its already got a ninja back bax im thinking going for the after burner decat and centre section (also the downpipe when i have the cash) i wanna no will i get any engine managment lights etc? What diffrence's will i notice from the 2 parts??

 

decat will throw a cel light on which will stay on unless you get either a remap or cel fix,
will not pass at mot unless you have a friendly garage as well,

power increase will be much better with earlier spool and less lag also will be a bit louder

other option is to find a sports cat down pipe,

 

I was told if i keep my downpipe with has a cat in im told then i will more than likley pass the mot?? my mot was last week i got 0.00 on emiisions he said a decat should still be within the limit but will check, How do you have a cel fix done and were?

 

I would de cat the up pipe and get a 2nd hand prodrive sport cat downpipe