aFe Twisted Steel Down Pipe Header RACE ONLY SS-304 12-16 BMW 328/428i L4 2.0L (t) N20 - afe48-46303-HN

aFe Power’s new Twisted Steel header delivers more horsepower and torque while outflowing the factory exhaust manifold. The header is constructed of 14-gauge 409 SS tubing with a 1/2” thick head flange to ensure a leak free seal. To eliminate dead space that can cause turbulence and hindering flow that formed collectors are prone to produce, a true merged collector and optimized tube lengths are used for true pulse control technology improving flow and performance. 100% hand TIG-welded construction ensures optimal strength and durability. The smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas flowing smoothly for improved performance and durability on and off the trails. All components are supplied for a hassle-free installation with no modifications necessary. PartNumber : afe48-46303-HN Description : Race Series Twisted Steel Down-Pipe; 4in SS Tubing; Incl. Hardware; Uses Factory O2 Sensors; Material : Stainless Steel Bend Angle : 45 Degrees Tube Size : 4 Center Line Radius : N/A Leg/Straight Length : N/A 2014-2016 BMW 328i Base L4.1997cc Exhaust, Mufflers & Tips::Headers & Manifolds 2014 BMW 428i Base L4.1997cc Exhaust, Mufflers & Tips::Headers & Manifolds