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Want to install a downpipe on your B58 equipped BMW, but still need to pass emissions? Evolution Racewerks has the answer for you with their B58 Catted downpipe. The Evolution Racewerks Competition Series Catless Downpipes is constructed from 304 stainless steel, featuring mandrel bent piping. These are 100% TIG welded by in house fabricators and built in the USA!
The factory turbocharger turbine housing utilizes a V-Band flange which has been duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods. The O2 sensor remains positioned at the factory location. Also, since Evolution Racewerks uses a larger 4.5" pipe right after the turbocharger, turbo backpressure is significantly reduced, resulting in less exhaust turbulence and backpressure which again improves throttle response and decreasing turbo lag.
aFe is proud to introduce the aFe Twisted Steel® non-catalytic down-pipe for the 2012-2013 BMW F30 335i with the L6-3.0L (N55) engine. In testing this system resulted in a max gain of 13 horsepower and 27 lbs. x ft. of torque and outflowed the restricted OE catalytic converter by up to 190%. 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" diameter 304 stainless steel tube and progressively tapers to increase exhaust velocity and usable torque.
Tig-Welded:
100% 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" Dia. 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 our 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.
This part alters or deletes the emissions equipment on your car, and may not meet emissions standards in all states. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.