Add to Wishlist MotorVac 500-4006P Diesel Tune 4000 MotorVac 500-4006P DieselTune IDT 4000 Diesel System Service Safe for Use In All Diesel Engines, Including Heavy-Duty Truck Applications Patented Microprocessor-Based For Ease Of Use Lowers Exhaust Opacity and Harmful Emissions Automatically Maintains... MSRP: $4,806.78