lundi 21 avril 2014

Catted downpipes vs catless downpipes

So I'm at the stage where I want to install some dp's. The only issue is I want the car to remain legal for insurance reasons.



Now I have a JB4 installed which I switch between map 5 and 1. If I install the AR downpipes with cats, is there going to be much difference to the standard items? Why does everyone go catless downpipes and possibly void their insurance by making the car unroadworthy?




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