Butler Built Air Ducts are used by many top NASCAR competitors. Computer aided design (CAD) provides optimum aerodynamic shape for smooth uninterrupted air flow. The NACA ducts can be installed in side windows or body panels to direct cool outside air to brakes, oil coolers or cockpit.Pit Stop USA offers ButlerBuilt® 8-1/2" x 11" Oil Cooler Duct - Double Hose 7029 at low everyday prices. Be sure to check out all of our products from ButlerBuilt Motorsports Equipment including ButlerBuilt Oil Cooler Scoops and Ducts and ButlerBuilt Oil Coolers - Rear End.
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