Spartan performance?
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#8
Ive been with Spartan since March-09 and love the tunes. I use their 210 Tow tune for pulling my toyhauler and definetly have power to spare while getting around 13-15mpg towing. The 275 and the 310 are just unreal and you will be pressed to find people whom can hang with you on the streets with these tunes. Daily driving with the 275,DPF Delete,AFE intake and 37"tires my truck showes 17.5-18mpg. SPARTAN RULES!!!!!!