You can either look at the Procomp Extreme A/T (40,000 mile warranty) or even the Swamper M-16.
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09' Mega 4X4, 6" Tuff Country, 20X9 XD "Hoss", 37" SS-M16. 5" TBE, EGR delete, Smarty S67 (18me w/pod), AFE CAI More parts coming from Coyote Canyon.