A custom exhaust is mostly unproven and will be a hit/miss proposition. Of course it all depends who does the work. A reputable bolt-on system has been R&D'd, tested and comes with certain guarantees as far as horsepower gains, quality and fit and finish. Personally, I would go the aftermarket bolt-on route.
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"That’s when you know you’ve found somebody special. When you can just shut the f*ck up for a minute and comfortably enjoy the silence.”-Mia (Pulp Fiction)
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