I have just bought a 2003 wrx new age, i am wanting to replace the cat in the down pipe and middle cat with a decat, then i am wanting to get remp done. what would i do when it comes to mot time???. As if have it remaped for decat ,will it run like a bag of crap when i have to put cats back in for mot???

 

Mate.
This probably won't get much of a responce in this section.Try reposting in general tech.Also worthwhile becoming a full member and then using the search facility.All your questions should have been asked before and answered.