A tuner set between 60-90hp will give you the most improvement over a exhaust,intake or anything else! THe best bang for the buck IMO is a diablo predator, u can usually pick one up new for around 400 bucks! but any tuner will get u some better MPG! Diesel Nut Motorsports
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Caleb
05 Reg Cab D-Max/ZF-6, Twin turbos, Twin Pumps, SBC Dual Disk
04.5 CC D-Max/Allison, Stock turbo, Modded Pump, Suncoast IV | 
Linear Mode
