Scion xB GReddy Supercharger Kits are complete bolt-on systems. Like our popular turbo kits, the two main keys, which set our kits apart, are proper compressor sizing at a reasonable boost pressure and reliable fuel enrichment though our pre-programmed emanage systems. Having access to various sizes of root-type Magna-Chargers, allows us more options to build force induction kits for vehicles where turbochargers would not be as ideal. By incorporating, an internal by-pass we minimize drag, while fuel tuning is optimized for smooth linear bolt-on power. Also included are the billet pulleys with tensioner, necessary brackets and hardware, as well as our high-flow precision cast aluminum intake manifolds. GReddy Superchargers are enhanced with the use of our GReddy stainless-steel headers and Airinx air intake systems.