The aFe Elite Twisted Steel Downpipe with Catalytic Converter for your 2011-2013 N55-powered E9X 335i or E82 135i delivers potent power gains (14 Hp and 39 ft-lb for the race version). This high-quality, free-flowing downpipe is constructed of durable, mandrel-bent 304 stainless steel tubing for long, trouble-free life, and it weighs in at just 10 pounds.
Designed for hassle-free installation and increased performance, aFe’s downpipe features a 2.5” into 3” stepped design for optimal exhaust velocity and scavenging. This 48-state legal downpipe includes a 400-CPSI catalytic converter for maximum flow characteristics. Strength and durability are enhanced with 100% TIG welding throughout.
- Dyno-proven gains of 14 Hp and 39 ft-lb (race version)
- Durable construction with 304 stainless steel tubing
- Bolt-on fitment for hassle-free installation
- Stepped design for optimal performance
- 100% TIG-welded
Fitment for the following vehicles with N55 engine:
2011-2013 E82 135i, 135is
2011-2013 E90/E92/E93 335i, 335xi
2009-2015 E84 X1 35xi
Notice of Emissions Non-Compliance. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, or other off-road use. It's use is prohibited in any motor vehicle that is subject to emissions inspection or control. It is not legal for sale or use in California on any pollution-controlled motor vehicle.
BMW Fitments: 1 Series
E82 / E88 (08-13) > 135i
E82 / E88 (08-13) > 135is3 Series
E90 / E91 / E92 / E93 (06-13) > 335i
E90 / E91 / E92 / E93 (06-13) > 335xiX1 Series
E84 X1 (2013-2015) > X1 35i xDrive