Fast-forward almost 100 years and the original Roots blower design is still in use today, although with several adaptations made for better use in an automobile. The Roots-style blower still rules the drag strip and practically every Top Fueler today runs a big blower on its 500-c.i.d. Hemi.
You'll also need to cannibalize your factory brackets and use some of their components on the included Magnuson brackets. | 
The stock throttle body and its mounting studs get transferred from the old intake manifold to the new inlet tube on the Radix blower. |
These new engines don't use traditional intake manifold gaskets, but they use O-rings instead. These new O-rings come with the Radix kit. | |
Most of the big Roots blowers that you see on cars today are descendents of the original GMC Detroit Diesel blowers that were installed on trucks to boost the power output of their slow-spinning diesel engines. They feature twin two- or three-lobe rotors, spinning in opposite directions inside a precisely machined case to move a large quantity of air at a relatively slow speed. Roots blowers can also be found on factory cars from Buick, Pontiac, Ford, Toyota and others, and the performance aftermarket has been adapting rebuilt GMC blowers to custom-built hot-rods for years.
After modifying the new Radix fuel pressure regulator using some cannibalized parts from your stock regulator, it gets bolted to the new fuel rails on the driver's side of the blower. | 
A quick spray of carb cleaner ensures a clean surface for the new blower's installation. |
The kit is heavy; get a buddy to help you lift it into place. | 
You'll be climbing all over your ride for this installation, so make sure that you have a couple of steps to climb up on and good fender covers too. |
A torque wrench is not required, but highly recommended. You'd be stupid to spend all the money on a blower and not install it using the proper tools, so get a torque wrench. | 
The factory fuel lines connect to the new fuel pressure regulator with a snap. |
Roots blowers are categorized by the size of the diesel engine they were originally fitted to. The most common, the 6-71 blower, was first used on an inline 6-cylinder GMC diesel with each of its cylinders displacing 71 cubic inches, (426 c.i.d. total). Likewise, the 8-71 GMC blower was fitted on inline 8-cylinder diesels, also with cylinder sizes of 71 cubic inches. There were also some smaller, less-known diesel engines like the inline 53-series that the OEMs and aftermarket have wisely adapted as under-the-hood-style superchargers. This is loosely what the Radix blower that we installed on our Avalanche is based on.
Installation Made Simple
One of the side benefits of the Roots blowers having been around for so many years is that they've become increasingly more popular on everyday cars and subsequently, much easier to install. The crew at MagnaCharger installed our Avalanche kit in just one day and followed up with some dyno testing to tell us the results of all that extra power.
The stock air box is removed to install the included high-flow air filter and make some wiring modifications to that side of the truck. | 
Speaking of wiring, get your crimpers out because this kit will require some more wiring mods as well. |
This steel support bracket makes sure that you don't over-stress and break the blower snout with some hard running. | |