E46 M3 Carbon Plenum / Airbox - CSL 120MM Kit

Our E46 M3 Carbon Plenum / Airbox - CSL 120MM Kit is the ultimate upgrade for your stock intake plenum. The stock M3 setup is fine for a stock car, and it's perfectly capable of moving the air required to make the base 333 Hp with the minimal induction noise - as a luxury car should have. On the other hand, if you're upgrading your car with an exhaust and headers to move more air and make big power, this carbon airbox has the ideal design to support the effort.

This carbon airbox is a reproduction of the BMW CSL part with a few changes to make it work even better. This high-quality unit is made from high-grade carbon fiber with internal trumpets and proper fittings, unlike many cheap copies from Europe that only look similar from the outside, and only from 10' away.

120MM Street/Race (Alpha-N Tune) Version- 120mm intake, internal BMW Motorsport panel filter (included), fitting for air temp sensor (not included), no mass air fitting. Requires alpha-N type ECU programming or standalone engine management (inquire with us for options). This plenum is great when packaging is an issue due to the internal filter. 

Note: For engines with stock internals, this 120MM version plenum provides the most power. Built race engines making 400+ Hp should use the 200MM version available in a separate listing. 

An alternate air temp sensor (PN 13 62 1 725 323) is required when converting to Alpha-N and is available separately. Installation requires splicing a plug for this part to your existing HFM wiring. 
While we are able to special order this part to be used with the stock HFM, we do not recommend this. We don't feel this part can be tuned properly without Alpha-N, and we do not support an HFM-based box with software.

E46 M3 Fitment Note: 2005-2006 E46 M3 will require plenum boot, part #11617830265 (see below for link).


Non-E46 Fitment Note: 2002+ MZ3, MZ4, and S54-transplant cars may require modification for fitment.

Notice of Emissions Non-Compliance. This product is intended only for vehicles that may never be used, or registered or licensed for use, upon a public highway. 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, hobby, or other off-road use. It is not legal for installation or use in California on any pollution controlled motor vehicle. It is not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations. Some suppliers have shipping exceptions to certain states or territories, requiring extra delivery time. We will advise you of any delays.

BMW Fitments:

3 Series
E46 (01-06) > M3
Z Series
E36/7 / E36/8 Z3 (01-02) > Z3 M - S54
Z Series
E85 / E86 Z4 (06-08) > Z4 M