I didn't really notice any difference to be honest! I expected way more noise etc but its not really designed that way. You do need to get it tuned to get the majority of the benefit from it. Maybe its a bit louder under hard acceleration, maybe its slightly more powerful....Don' expect it to be a massive difference on its own. There is a youtube shootout you can find that measured some increase without a tune but something like 35kw with a tune.
It's more that it won't blow up if you don't get it tuned straight away rather than it being a performance mod you can feel without a tune, if you understand me.
It's more that it won't blow up if you don't get it tuned straight away rather than it being a performance mod you can feel without a tune, if you understand me.