We've been working hard on new grinds for your Cummins 3.9L 4BT series diesel engine. We have 4 stages available, with profiles that are meant for driveability or for out-and-out racing. The first 3 stages will increase your mpg, decrease smoke output and drop your EGT temperatures significantly!
We've been working hard on new grinds for your Cummins 3.9L 4BT series diesel engine. We have 4 stages available, with profiles that are meant for driveability or for out-and-out racing. The first 3 stages will increase your mpg, decrease smoke output and drop your EGT temperatures significantly!