Exhaust question

[Teo197]

Hello!! I have a question and i want your help!!!

Now, my clio 197 has only sport back box. if i replace factory cat with 200cell sport cat and factory middle silencer with a sport, then i must remap the ecu?

Thanks!

 

[montana]

Hello!! I have a question and i want your help!!!

Now, my clio 197 has only sport back box. if i replace factory cat with 200cell sport cat and factory middle silencer with a sport, then i must remap the ecu?

Thanks!

You dont need to , but you will probably get a better result if you did also have a remap.

I have a cat back Milltek with no remap and mine is fine (i dont have any flat spot issues either).