I want to know if i can buy and switch down pipe without deleting opf? Down pipe is 250cel from logos. They claim there should be no error/cel. And that is what i want because i payed alot for brabus box and dont want to go stage 2. But if i can buy downpipe and will have no problem and gain more sound and actually gain some hp(not as much as i would with stage 2) then i am up for it.

 

What’s opf?

 

opf/ppf its a filter for eu standards. petrol particulate filter or something like that