XS LS3 Intake Manifold

The Performance Design XS LS3 Intake Manifold is engineered to overcome the limitations of traditional intake manifold designs, maximizing available space under the hood. By integrating the fuel rail internally, it allows for optimal intake runner length and shape. Testing has shown this manifold delivers horsepower and torque gains on stock engines, with performance benefits further amplified as the engine becomes more aggressive with cam and exhaust upgrades. Constructed from injection-molded, glass-reinforced nylon, the XS Intake Manifold features modular runners with three staggered lengths for enhanced performance. It includes billet fuel rails with an external quick disconnect and accepts standard EV6 LS3/LS7-style injectors, utilizing injector extension wires passed through sealed grommets. The manifold is equipped with a 112mm forward-facing throttle body flange (throttle body sold separately), a carbon fiber center bolt cover, and retains the factory MAP sensor location. It also features OEM connections for PCV and Canister Purge Solenoid, and comes complete with stainless steel installation hardware and molded port, plenum, and throttle seals. This intake manifold is designed to fit all LS3-style cylinder head ports, including L92, L99, L76, L77, LY6, LY2, L20, LMF, LC9, LH8, LH9, L9H, and L94. It is specifically designed to fit under the hood and cowl of a C6 Corvette. The manifold can be reversed on the engine for installation flexibility. It has a plenum volume of 16.4L and is recommended for a maximum boost of 20psi. Please note that a CARB E.O. application is in process, and the product may not be legal for sale or use in California.