The supercharger came from Whipple. You can find their site at
WWW.whipplesuperchargers.com. The power is increadable. I use my truck for work and pull a 4000 pound trailer. Before I got the supercharger my truck did pull the trailer but on hills it had trouble. Now it pulls it with ease. It also does awesome high speed launches at stop signs. I have not had it to the dyno yet