aFe (48-36311) 304 Stainless Steel Down-Pipe for BMW 335i L6-3.0L N55 Engine

aFe is proud to introduce the aFe Twisted Steel non-catalytic down-pipe for the 2012-2014 BMW F30 335i with the L6-3.0 liter (N55) engine. In testing this system resulted in a maximum gain of 13 horsepower and 27 pound x feet of torque and outflowed the restricted OE catalytic converter by up to 190 percentage. This high performance race pipe delivers pure, race-inspired raw power and also produces an aggressive and exciting exhaust sound during hard throttle. aFe also used a massive, light-weight 4 inch diameter 304 stainless steel tube and progressively tapers to increase exhaust velocity and usable torque. TIG-welded: 100 percentage TIG-welded by certified craftsmen for race proven strength and durability. TIG-welding provides the strongest welds reducing stress cracks. Tapered design: A unique 4 inch diameter 304 stainless steel taper design is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power. Factory O2 sensor locations: Factory mounting locations for all O2 sensors. Hassle-free installation: OE style brackets are included for a hassle-free installation. This unit also comes with a lifetime warranty. aFe down pipes are engineered and manufactured in Corona, California manufacturing facility. Note: This is a 'race only' product used solely for competition. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use could be in violation of local, state and federal laws. A check engine light will emit and aFe recommends using a programmer but it is not necessary.