Slightly used (4 hrs) Performance Design Carbon XR Carbon Fiber Dual Plenum Dual Throttle Cross Ram Intake Manifold. Fits LS7 ports. For use in performance marine, offroad race truck/sandcar, hotrod/resto-rod, airboat, kitcar, and racing markets. Due to the long runners, will not fit under a stock Corvette or Camaro hood. Designed for use with either 75mm or 90mm throttle bodies. Included are 2 GM RME 87 90mm throttle bodies, and all port gaskets. Provided gains of 52lb/ft and 56 hp at 5700 rpm as tested by Lingenfelter. Larger gains possible on race-prepped LS7s. These products list for $5500; asking $3000. More info available at performancedesign.com. For pictures and questions call Bob at 860-742-6133, or email robertboucher@charter.net