hi everyone ,, i would like to ask about installing the aftermarket catalytic for stelvio qv ,is anyone know whats is the best brand ? and how much that cost , i also would like to know since im new to this ,is installing the high flow aftermarket with cause of CEL or any other faulty warning? and last thing, changing the stock cat will change the exhaust note? because i like the current sound , thank u
devyq8
Joined
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272 Posts
If its a highflow cat or a piggied Cat it will definitely make it louder.
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