Make your Duramax Fly. With the Allison 5 and 6 speed, the Duramax is already fun to drive. Why not add an addition kick with DDP Injectors. Unlike an electronic box, honed performance injectors are almost impossible for a factory technician to detect. With DDP’s Balance Honed injectors you can be confident that your warranty will not be compromised and you’ll have the extra pulling power to beat your friends up the mountain.

The Competitor Series nozzles are deisgned to be used on trucks that do not get used on the road.  They are strictly for race applications.  When ordering please fill out this form and email it to us.  We will have to have this form in order to build your injectors and in order to ship them as well.

Dual CP3 s are required with these nozzles, your stock pump will not keep up.

As always, this product is covered by our 3 year unlimited mileage warranty and our 30 day money back guarantee.  Please see our Policies section to read more.