Mbrp dual exhuast.
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I have that setup on my truck and love the looks and sound. The kit is designed to work on either and it still allows you to keep the factory spare in place. My setup is 4" with 6" tips but the come with 5" tips. As far as I know it's only avalible in 4" from the turbo back. It's a nice system that fits the truck very well! You won't be sorry if you get the setup.