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Message: [QUOTE="Justinlw, post: 1504292, member: 28701"] Just saw your reply. I’m looking up the 5” Donaldson now, hopefully that will kill the noise in the cab. I don’t feel the need to completely kill the exterior noise, but I will be a little quieter than you with the 4” Cat installed. Hopefully I can get the new muffler on next weekend and be ready for summer trips. If it takes stepping up to 5”, I would have to do it after the cat. I’m not spending another $350 for a 5” cat. I tow a camper with the truck and my Dad has emphysema. Swears he can smell the exhaust in the camper when we get to deer camp. The Magnaflow cat kills the smell. Sent from my iPhone using Tapatalk [/QUOTE]

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