i have line-x, above the rails. lifetime warranty, so if you chip a piece out for some reason just take it back and they'll replace it. also i farm too and im always throwing random crap back there.
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09' Dodge 6.7 QC SB, G56, 3.42s. 5" turbo back, s&b intake, egr and cooler removed, dpf deleted, isspro pyro and boost, smarty s67, valair DD 3600#. 285/75/17 Toyo M/Ts.