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Actually, it shouldn't make it louder. They do just that, let the exhaust flow past the honeycomb internals better than stock. The muffler is where you get the loudness/quietness.
Actually, it shouldn't make it louder. They do just that, let the exhaust flow past the honeycomb internals better than stock. The muffler is where you get the loudness/quietness.
I am an Inspection Mechanic & exhaust tech. Do not waste your money on a so called high flow cat. I have seen the so called hi-flows cut apart and the substrate is exactly the same as a stock replacement cat. The are made exactly the same. Eastern Catalytic has come up with a new design that they claim to be the only true hi-flow cat. It has far fewer holes of a larger diameter for better flow. Not sure how it works though as I haven't had the chance to try one as we stopped carrying them at work because we were having too many problems and switched brands.