aFe Power 2011-2013 BMW 135i/335i N55 Twisted Steel Down Pipe 3″ to 2.5″ 304 Stainless Steel w/ Cat

aFe POWER Twisted Steel down pipe w/ Cat for the BMW 135i (E82/88) or 335i (E90/92/93) models with L6-3.0L (t) N55 engine. This down pipe is designed using a 400 cpsi catalytic converter and mandrel-bent, 304 stainless steel tubing for optimum flow resulting in added horse power and torque. The down pipe is 100% hand TIG-Welded and uses a 2-1/2 IN to 3 IN stepped design that increases exhaust velocity and eliminates low pressure drops which helps to scavenge the exhaust for increased intake charge and more power.

Catalytic Converter:
This system utilizes a 400 CPSI (cell per square inch) catalytic converter for maximum flow.

2-1/2 IN to 3 IN Stepped Design:
A unique 2-1/2 IN to 3 IN stepped design, is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power.

TIG-Welded:
100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.

Brushed 304 SS Construction:
This down pipe is constructed of durable mandrel bent brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking.

Hassle-Free Installation:
All hardware and brackets are included for a hassle-free installation. This unit also comes with a 2-year warranty.

Race Disclaimer:
This is a Race Only product that is to be used solely for competition, it cannot be used on vehicles that are operated on public streets, roads or highways. 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. To complete the purchase of this item, aFe POWER competition acknowledgement/liability release form must be filled out and submitted.

All aFe exhaust systems are engineered and manufactured in our Corona, California facility.

Brand

aFe Power

advanced FLOW engineering (aFe Power) is a premier designer and manufacturer of automotive performance upgrade systems and components. Current product lines include cold air intake systems, high performance direct fit and racing air filters, exhaust systems, intercoolers, turbochargers, electronic programmers, diesel fuel systems, throttle body spacers, and more. aFe is passionate about providing the most compelling, innovative, and highest performing products that are designed, built and tested in the USA. aFe was founded in 1999 and has headquarters and manufacturing facilities in Corona, California, USA.