aFe POWER Twisted Steel down pipe for the BMW 135i (E82/88) or 335i (E90/92/93) models with L6-3.0L (t) N55 engine. This down pipe uses a unique resonance chamber to capture sound waves and minimize in-cab resonance producing an aggressive tone on throttle with a smooth sound at cruising speeds without effecting performance. In recent testing, the race version down pipe produced +14 HP and +39 lbs. x ft. of TQ. The high-flowing down pipe is designed using 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 into 4 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.
This down pipe is designed using a resonance chamber to help reduce the in-cab resonance found with other non-catted down pipes.
3-1/2 IN to 4 IN Stepped Design:
A unique 3-1/2 IN to 4 IN stepped design, is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power.
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.
All hardware and brackets are included for a hassle-free installation. This unit also comes with a 2-year warranty.
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.
Year Make Model SubModel Engine Fuel 2011-2013 BMW 135i (E82/E88) N55 Engine L6 3.0L (t) Gas 2011-2011 BMW 335i (E90) N55 Engine L6 3.0L (t) Gas 2011-2013 BMW 335i (E92/E93) N55 Engine L6 3.0L (t) Gas 2011-2011 BMW 335i xDrive (E90) N55 Engine L6 3.0L (t) Gas 2011-2013 BMW 335i xDrive (E92/E93) N55 Engine L6 3.0L (t) Gas 2013-2015 BMW X1 (E84) N55 Engine L6 3.0L (t) Gas
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- I couldn't be happier with the performance and sound of the...
- I couldn't be happier with the performance and sound of the aFe POWER down pipe. I've tried other 4" down pipes on my N55 but took them off because of drone and the lag they created. I was skeptical at first, but hands down, the engineering of this down pipe is by far the best on the market. Even at first glance, you'll notice there's something different. That arm-like tube isn't just for looks, it's their unique resonance chamber that eliminates any drone. Take a look on the inside and you'll see the sharp y-pipe design splits the air reducing excess turbulence, a detail neglected by others I've tested. Installing and uninstalling exhaust parts are a pain. Do it right the first time and buy aFe.