Now you can bolt-on an Edelbrock E-Force supercharger system & boost the power in your GM truck or SUV. These GM supercharger systems are specially designed for each application & will allow you to boost your towing performance to impressive Levels. These systems feature 12 Long intake runners for maximum Low end torque making them ideal for towing & off-road performance applications. -all 2017-later GM truck & SUV supercharger systems will require the ecm to be sent in for modification. No handheld programmer included. This is an 8-10 day process/waiting period from the time they are received! -systems #1560, #15600, #1561, #15610, #1577, #15770, #1578, #15780, #1579, #15790 require an Edelbrock supplemental fuel pump kit (sold separately, see below). Failure to use a supplemental fuel kit May result in engine damage & will void your warranty. #15790 will also fit 2007-08 1500 series trucks w/ a 6.0L engine (requires custom tune). Supercharger systems sold w/o tunes are only emissions Legal when used w/ the correct Edelbrock tune, which can be downloaded on the supercharger tech support page.