TBS 250 LS3- RECTANGLE PORT DRIVE KIT- 16 RIB ACCESSORY FOR ATI CORVETTE BALANCER (#3153) This TBS Low-Profile 250 Supercharger kit is specifically for LS3 Rectangle Port applications. Designed for mild street use and comes as a complete kit for one convenient price. This drive kit features a 16 Rib serpentine style belt drive. It includes the 250 supercharger, LS3 manifold, and all necessary drive accessories required for assembly. For use in conjunction with ATI Corvette Balancer. ATI PN#917246 The 250 is a max 10lb boost application.