aFe POWER Twisted Steel Long Tube Headers are constructed of near equal length 1-1/2 IN 16-gauge 304 stainless steel tubing with thick flanges to ensure a leak free seal. To eliminate dead space that can cause turbulence and hinder Flow that formed collectors are prone to produce, true merge collectors and optimized tube lengths are used for true pulse control technology improving Flow and performance. 100% TIG-welded, the smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas Flowing smoothly for improved performance and durability. It uses dual, high Flow, 300 CPSI metallic catalytic converters for maximum Flow providing an astonishing low end torque improvement. All components are supplied for a hassle-free installation with no modifications necessary. 100% TIG-welded by certified craftsmen for race proven strength and durability. TIG-welding provides the strongest welds reducing stress cracks. The ceramic 300 CPSI metallic catalyst is designed for maximum surface area and Flow. aFe has designed this system to retain all your factory sensors for a hassle free installation. Also included are 6 O-ring header flange gaskets. Mitered collectors not only extend the tube lengths and decrease turbulence, but provide optimal exhaust scavenging. The result is increased horsepower, torque and improved throttle response. These headers are constructed of durable CNC mandrel bent brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking. Dual high Flow catalytic converters increase power and torque Constructed out of 304 stainless steel for maximum durability 100% hand TIG-Welded by certified craftsmen for strength and durability Bolt-on installation, no cutting or welding necessary VEHICLE FITMENT 2006 BMW 325i (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E90) 2006 BMW 325xi (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E91) 2007-2013 BMW 328i (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E92, E93, E91, E90) 2006 BMW 330i (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E90) 2006 BMW 330xi (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E90) 2007-2008 BMW 328xi (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E90, E91, E92) 2008-2013 BMW 128i (Engine Designation: N52B30A & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E82) 2009-2013 BMW 328i xDrive (Engine Designation: N52 & Liter: 3.0 & Cylinder: 6 & Block: L & Fuel: GAS & Mfr Body Code: E92, E91, E90)
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