CSF Racing Charge Air "Race X" Intake ManifoldBMW Gen 2 B58 Race X Charge Air Cooler Manifold Raw Billet The Race X Manifold is designed for high level motorsports competition and racing applications. The limits of the current Super Manifold are very high and more than enough for many enthusiasts, tuners, and racers. However, those looking to push their Gen 2 B58s to the maximum have been asking for more. Race X features a 25% larger core, additional parameter ports, and an optimized water flow