These Cadillac superchargers that came on the STS-V and XLR-V, with the 4.4L LC3 Northstar engine, are a pretty cool little supercharger and they are flooding the market for sale cheap. Apparently there was some large quantity of new superchargers that came available after a distributor shut down. Of course that’s just one of the stories I’ve heard. Regardless, these things are available for $400 to $500 and should be able to make some power. The big challenge is getting the thing bolted to an LS engine as the port locations, bolt patterns, etc. are all off. Thankfully, there are a few companies making adapters that can get you where you need to be. There are other challenges, but you’ll see how to overcome them in this video from Richard Holdener.
Here is the video description:
HOW TO: CHEAP EBAY CADILLAC SUPERCHARGER ADAPTERS! CHEAP CADILLAC SUPERCHARGERS ARE ALL OVER E-BAY AND THE INTERNET, BUT HOW DO YOU MAKE THEM FIT ON AN LS? USING ADAPTERS FROM MACKDADDYPARTS.COM, WE INSTALLED AND DYNO TESTED THE INTERCOOLED, M122 BLOWER DESIGNED FOR THE 4.4L CADILLAC STSV ON A 4.8L. THE TEST WAS RUN ON 91-OCTANE PUMP GAS FOR REAL WORLD POWER. CHECK OUT HOW WELL THE CHEAP BLOWER WORKS ON THE LS!