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I have a Outlaw Power CAI. It draws in cool outside air, not hot underhood air like the open filter guys. I have a Diablosport Predator tuner (much better than a chip) and a Flowmaster cat-back system. I have been happy with the power gains from this set-up. Better mileage too!!!
Stock manifolds and cat's, I use a 40 series muffler #430402 with 3" inlet and dual 2.5" outlets exiting out the rear with stainless tips. The 40 series is louder than the 50 series. It's not overly loud and you can talk normally in the cab.
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