If the slight increase in noise does not bother you, then for the one off price you will pay , for the cat back system , its a no brainer. You will save money in the long term and hassle free , is a big incentive. If done well and you dont mind a little extra noise ( it wont be as quiet as the original set up ) as marinabrian once remarked , it should outlive the life of the car . Fair comment.
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