This aFe Twisted Steel down-pipe with 300 CPSI catalytic converter outflows the factory down pipe by up to 150%. In testing this system produced up to 10 horsepower and 16 foot pounds of torque over stock. This high-performance down-pipe delivers the perfect balance of pure, race-inspired performance, in-cabin driving comfort and the excitement of exhaust sound and tone during normal cruising or aggressive hard throttle application. The catalytic converter is not only environmentally friendly is also prevents check engine lights.
- Tig-Welded: 100% TIG-welded by certified craftsmen for race proven strength and durability. TIG-welding provides the strongest welds reducing stress cracks.
- High-Flow Catalytic Converter: This system uses a 49 state legal 300 cell per square inch (CPSI) stainless steel high-flow catalytic converter designed for maximum flow and performance while preventing a check engine light.
- Factory 02 Sensor Locations: Factory mounting locations for all 02 sensors.
- Hassle-Free Installation: OE style brackets are included for a hassle-free installation.
- Lifetime Warranty
aFe down pipes are manufactured in Corona, California
We suggest purchasing a new down-pipe gasket part number 18 30 7 581 970 for installation.
Note: This is a "Race Only" product used solely for competition. It's 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.
advanced FLOW engineering, inc. (aFe Power) is a manufacturer of high performance automotive cold air intake systems, performance air filters, fluid filters, throttle spacers, turbochargers, intercoolers, differential cover, transmission pans, headers and exhaust systems. aFe is headquartered in Corona, California in two facilities totaling 164,000 sq. ft. including their 77,000 sq. ft. headquarters and manufacturing facility. An 87,000 sq. ft. warehouse and R&D facility was added in 2012.
aFe's product line up currently includes over 2,300 part numbers, which are all designed, developed and manufactured in their Corona, CA location. aFe Power puts a great deal of focus on the BMW category with one of the most complete lines of performance products for BMW. The aFe Power product line-up includes performance air filters, cold air intake systems and exhaust systems. Many members of the aFe Power team, including their president, are BMW enthusiasts and you will find dozens of new products for various BMW applications launched every year.
Everything we sell comes with a minimum 12-month warranty and a 100% satisfaction guarantee. In addition, products that carry the Bavarian Autosport brand come with a minimum 2-year warranty against defects in materials and workmanship. (Some have lifetime warranties!) If you are unhappy with a product's quality or performance, simply let us know. We'll make it right. Call Customer Service at 800.535.2002, option 7, or e-mail [email protected].