Headers are a bolt-on component that will make a huge improvement in how your BMW performs. As a replacement for your factory BMW exhaust manifold, our BMW headers provide a more direct path for exhaust gasses leaving your engine. Headers prevent your BMW's exhaust pulses from "fighting" one another as they leave the head. The end result is that BMW headers give you more power and torque, and you'll love the high-winding top end push that a free-breathing engine exhibits. BMW headers are a must-have if you're doing any engine modifications on your vehicle. Along with a cold air intake, BMW headers provide the free-flowing exhaust necessary to get the most power out of your motor.
Available for the following BMWs: (click icon to change BMW)
Active Autowerke Downpipe & Sim - 135i 335i with N54 engine
(more info) A turbo impeller wheel speed is mostly limited by the exhaust back pressure within the system. If one could eliminate some or most of this exhaust back pressure, the turbo will spool that much faster and effortlessly resulting in quicker engine revs and increase HP. The Active Autowerke Signature down pipe is designed with the intent to maximize in power. The down pipes are created with the least amount of restrictions possible by utilizing a full 3" piping throughout with the least amount of bends possible, that is impressive when compared to the factory diameter of 2.50". What you will experience is a faster, more responsive engine because the turbo impeller now has the ability to spool that much faster. The end result is more power. For added durability, factory like support braces are also implemented to alleviate stresses upon the turbos. Made from 304 stainless throughout ensures a robust and durable exhaust that will provide trouble free performance with the longevity to match. All flanges are 304 stainless with the 0.060" wall thickness (~1.5 m.m.). Installation instructions included.
Included Sim prevents CEL (Check Engine Light) from activating and keeps the readiness codes active to allow for emissions testing.
This part alters or deletes the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.
This item fits the following BMWs:
2008-2010 E82 BMW 135i
2006-2010 E90 BMW 335i - Sedan
2007-2010 E92 BMW 335i - Coupe
2007-2013 E93 BMW 335i - Convertible
Not for 335is, 335Xi or 335i xDrive models.
Part #: AA-N54DOWNPIPE
Price: $794.95 (USD)
aFe MACH Force Down Pipe - E9x 335i with N55 engine
(more info) This awesome Mach Force XP Down Pipe produces 14 horsepower and 39 lbs. x ft. of torque at 1900 RPM. The Mach Force XP down pipe is constructed of mandrel bent, brushed 304 stainless steel tubing and flanges and uses all factory mounting locations. Using a unique resonance chamber to capture sound waves and minimize exhaust "drone", this system produces an aggressive tone on throttle but a smooth sound at cruising speeds without affecting performance. This down pipe is 100% TIG-Welded. Note: this product will activate the check engine light.
Headers
