aFe Cold Air Intake System (4-1/8 IN ID to 3-1/2 IN ID x 49 Deg.) Elbow Reducing Coupler(59-00085) 1814 This smooth reduction in cross

This smooth reduction in cross sectional area invokes the Venturi effect where internal pressure reduces whilst maintaining laminar conditions

Upgrade to the APEXi N1 Evolution-X Exhaust System today and feel the difference in power

This kit comes with an EPA compliant catalytic converter for a bolt-on and go installation

This software carefully remaps factory BMW DME tables

aFe Cold Air Intake System (4-1/8 IN ID to 3-1/2 IN ID x 49 Deg.) Elbow Reducing Coupler(59-00085) 1814 This smooth reduction in crossMagnum Force Intake Elbow Coupling Kit (59 00085) by aFe. The polyurethane construction is designed to meet modern elevated engine compartment temperatures with a reaction injection molded (RIM) polyurethane configuration. Standard stainless steel worm gear clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off road and racing applications. aFe (Advanced Flow Engineering, Inc.) manufactures