Our VAC CSL Carbon Fiber Airbox kits are designed to replace the OE factory airbox, improve performance and weigh only a few lbs!
Our comprehensive kit along with the beautiful craftsmanship of our CSL-Style Air Box makes for an excellent combination when performance and exclusivity is key: This is more than an air-intake; double digit power gains, artisan craftsmanship, and sound like you have never heard propel your car into a whole new level of performance and esthetics.
No longer do you have to purchase an airbox overseas; or battle with low quality kits that are far from comprehensive.
Our quality is unrivaled, with excellent fitment and durability.
Our kit is specifically made for converting a non-CSL E46 M3 into a near perfect replica, with even more flexibility so you don't have to hunt down the expensive parts from BMW that are no longer available, or simply too costly.
Along with a VAC flash to you ECU, you can achieve the exotic, naturally aspirated performance you crave on your S54! Reliability and performance live in harmony
Image1: Overview of OE CSL Image2: Internal view of VAC box Image3: External view of VAC box Image4: Optional Hose Adapter Image5: OEM Air filter installed Image6: Optional Cold Air Snorkel
CSL Airbox Kit
Owners of the E46 M3 and S54 powered vehicles know; it has been a challenge for many tuners to improve on BMWs factory power output and delivery.
The CSL was BMWs ultimate achievement with the S54 offering true motor-sports performance on the street, or dominance on the track.
As an exact-replica of OEM, our CSL box utilizes the 200mm intake diameter, internal BMW Motorsport panel filter (click above to add), fitting for air temp sensor (included), and elimination of the mass airflow sensor as on the CSL.
This is an excellent match for our "CSL Killer" or Race engines. Can be fitted to the Z3M with minimal modification.
Extremely light weight
Improved performance
Compatible with Flashed OEM ECU, or aftermarket standalone ECU
This kit exclusive to VAC
Exceptional quality
Compatible with BMW OE CSL Airfilter element
Airbox kit includes:
2-Piece CSL replica box
Needed Air Temp Sensor
Breather Adapter
Needed Accessories to mount to non-CSL vehicles
Options:
OE Air Filter
Cold Air Snorkle
4" or 6" Hose Adapter
Comparison:
VAC Airbox
"Other" Airbox
ECU Compatibility
Standalone ECU tunes
available/
OEM ECU flash available (at reduced cost direct from VAC)
No ECU tune from
retailer, or generic tune
available from others
Air Metering
True CSL style Alpha/N
Some use MAF (minor performance
gain)
Some are true Alpha N
SMG or 6 Speed
Compatible?
We offer Specific SMG and
6 Speed Compatible kits
For 6 Speed
Intake trumpets
Includes all
new intake trumpets
Many require your
core trumpets, or a core set purchased. Others are using an inferior
plastic.
Have a listen to our airbox installed, absolutely amazing! You can skip to 1:15 for the good parts (sound at full throttle)!
VAC Tech Notes:
The CSL airbox requires Specialized ECU tuning if standard BMW ECU is to be retained.
Compatible with custom BMW CSL software and also custom software that enables "Alpha/N" mode.
Note that we do not offer an HFM/AFM style airbox at this time as we feel the Alpha/N style tuning offers such an improvement in performance.
Q:What is the flap door on the end of the CSL Box and do I need it?
A: This is mostly used as an intake muffler, BMW used it for sound control and for sealing the intake at idle.
While BMW will still sell you this flapper door, many CSL owners have removed there door; it is unnecessary to fit to your car and can save you additional cost. All intake air is filtered as the CSL box has provisions for the filter inside the box.
Q: Can this run on my factory BMW ECU?
A: Yes with the proper Alpha/N Software flash (that we can also provide). Engine functionality is just as reliable and smooth as the OEM BMW E46 M3 CSL with our excellent software.
Q: Can I use this with my Supercharger/Turbocharger kit?
A: No, it is for use with N/A tuning only.
Q: What else will I need for this intake to function?
A: Our kit is the most comprehensive available! It includes the needed fittings and sensors to be adapted to a non-CSL model that others who just sell boxes don't include.
This kit can be used with the standard E46 M3 bumper, or modified for use with the CSL M3 bumper & CSL-cold air plumbing. We also include a Cold Air Adapter so that you can use your OE Non-CSL cold air duct!
Q:Is there a lower cost solution to add the airbox to my car?
A:See our Race style airbox, it makes even more peek power, but due to its simpler shap it costs us less to make and we pass this onto you.
Q:Is this an exact replica of OEM?
A:In volume and external appearance, yes our airbox is an exact replica of OE. However, our latest revision does not need the OE CSL
intake ducting and we have also adapted our version to use various types of
temperature sensors for different uses (weather the car is a factory CSL, Euro
or US type arrangement). We also offer a cold air duct that offers better
performance than OE.
Air Box Kit Package: Full Airbox Kit; Full Airbox Kit w/ 4" Hose Adapter; Full Airbox Kit w/ 6" Hose Adapter; Full Airbox Kit w/ Cold Air Snorkle Adapter