Performance Design Carbon XR Intake Manifolds

Performance Design carbon XR intake manifolds feature cross-ram architecture constructed of carbon fiber and billet 6061-T6 aluminum for your LS3/LS7 application. They are built for torque with long runner lengths and plenums that employ a high-temperature, resin-infusion manufacturing process for consistent walls and a beautiful finish out of the mold with an internal core for rigidity. Their 5-axis CNC-machined head flange offers perfect port matching to the head entrance. The carbon fiber runners feature high-temperature, pre-impregnated manufacturing with braided stock resulting in no seams or ply drops throughout the part for ultimate strength. Build for performance without losing sight of aesthetics when you order the black or red Performance Design carbon XR intake manifolds best suited for your application. Other product features, items, and specifications include: * Runner length of 12.50 in. from bell mouth to head interface * Bell mouth entrance on each runner features a 2.75 in. effective diameter * Height – approximately 11.60 in. from block valley * Dual 90mm throttle with GM 4-bolt design (custom throttle plates can be used to fit different throttle bodies) * Plenum volume - 7.2L each (14.4L combined) * Accepts USCAR EV6-style fuel injectors (LS9/LSA injectors have targeted spray patterns and are not recommended) * Can be reversed on the engine * Works with moderate boost (rated up to 25 psi; custom builds for higher boost levels available as special orders) * Best suited for race cars, resto-mod, off-road race trucks, race boats, and hot rods (does not fit underhood on late model vehicles) * Throttle bodies can be rotated 180 degrees on LS7 versions * Single or dual IAC (LS1 style) can be mounted on either bank of LS7 versions * LS7 version accepts Gen 4 GM MAP sensor and features three 1/4 in.-NPT ports for PCV, charcoal canister, vacuum line, etc. Show Less