Edelbrock Cross-Ram LS3 intake manifolds are ideal for anyone looking to combine great looks and outstanding performance between 1,500 - 7,000 rpm. The unique dual-plenum design features 13" long runners with flanges that will accept two, 90mm GM LS3 throttle bodies. The unique cross-ram dual-plenum design is ideal for twin turbo applications. When matched with high flowing air filters and inlet tubes, the dual-plenum system gives neck-snapping performance with plenty of options for engine builders and tuners. Edelbrock fuel rail kit 3654 is recommended as well as GM PN19256623 LS3/LS76 style individual port o-ring seals are used on the intake. GM LS 90mm throttle bodies are recommended.