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I am planning on keeping the DPF on, and I really am not interested in blowing black exhaust all over town, but I am intrigued by the H&s and Spartan as well. But I am concerned about stressing the motor too much with these tunes. Thx for the response.
you might leave the exhaust pipe off the deal as the dpf/doc create a considerable amount of backpressure so adding an expensive "tip"and yet leaving the intact oem emissions devices is probably not needed.but i know the banks tunes are clean and they have improved my mpg's.