Description Unleash your 2011–2016 Chevy or GMC Duramax with custom tuning from Motor Ops at Dirty Diesel Customs. Choose between Single Tune or Switch-On-The-Fly (SOTF) options to suit your driving needs. Single Tune Option This package includes access to five custom tunes: Optimized Stock, Heavy Tow, Light Tow, Sport Economy, and Race. Only one tune can be flashed to the vehicle at a time. To change tunes, you'll need to reflash the truck using your tuning device with the ignition off and connected to a power source. This tune is ideal for drivers who stick with one power level for long periods. Switch On The Fly (SOTF) OptionSOTF tuning lets you switch between the same five power levels "on the fly", while driving, using an in-cab switch. Whether you're towing, daily driving, or looking for max performance, you can easily dial in the perfect tune without shutting off and reflashing the truck. Features Access to all five tunes in EZ-Lynk Cloud Instantly switch tunes while driving (SOTF) Load and use one at a time (Single Tune) Motor Ops tunes produce less smoke More consistent power delivery Easy installation Tuning HEAVY TOW For towing from 8,000lbs up to Gross Vehicle Weight Rating Wider torque curve assists heavy loads +40 RWHP, +80 ft-lbs torque Exhaust temperatures drop up to 100F under full load LIGHT TOW For those towing below 8,000lbs Perfect balance of sport driving & functionality Designed for weekend tower, boats, small tractors, etc Unhook and enjoy a sportier drive +60HP, +120 ft-lbs torque SPORT ECONOMY Fun unloaded daily driving For driving around town, highways Impress your friends Put a smile on your face +110 RWHP, +200 ft-lbs torque Puts your vehicle near the 500 RWHP mark RACE Maxes out the factory fuel system +140 RWHP, +260 ft-lbs torque Adds 260 ft-lbs of torque over factory Recommend transmission tune to avoid premature wear If you drive responsibly, can use Performance as you would Sport Economy Also recommend FASS or Air Dog lift pump to maintain 530 RWHP OPTIMIZED STOCK: +10-15 HP, +30-40 ft-lbs torque Leaves factory rev limit in place Transmission Tuning Increased transmission line pressure for holding more HP and torque Revised shift schedule to improve drive-ability Keeps the truck on top of the turbo Improved shift timing Re-designed torque converter lock-up strategy Allows power transfer from the engine to the wheels more directly Notes Transmission Tuning is not available for 2015 trucks with an A50 controller. Switch optional based on model year. 4-Week Lynk VS Lifetime Lynk The 4-Week Lynk Package gives you access to all 5 tunes for your vehicle for 4 weeks. This is convenient if you’re seeking a single tune to install on your vehicle. Once the 4 week expires, the tune that is currently in your truck will remain. Upgrading to Lifetime Lynk will give you access to all tuning. The Lifetime Lynk Package offers unlimited permanent changing on all tunes. Every Lifetime Lynk Package includes permanent link features so that you can change your tunes from anywhere, at any time. Installation Click here to view EZ-Lynk instructions Don't want to read? Check out the install video below!