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JCW Intake High Flow Air Filter Replacement

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Product Description

Do you want to gain 4-5 horsepower with only about five minutes work?

If you have the optional John Cooper Works air intake then you've got some work to do. When John Cooper Works created their Mini Cooper S airbox they neglected to use a high flow performance air filter.  Unfortunately, their JCW Mini Cooper S air box still uses a paper filter element, which is very restrictive, significantly limiting airflow.  Our replacement high flow velocity stack filter is a direct fit and installs in 5 minutes. 

After the switch It felt as if the car was being shot out of a slingshot, it just took off!  Testimonial of Mini Cooper S Owner.

The Madness Mini Cooper S High Flow Air filter gives you both increased airflow and reusability at a very low price.  Considering that their restrictive/non-reusable John Cooper Works replacement paper filter costs $170 to replace, can you afford not to make the switch?  The Madness high flow Filter can be cleaned so that it may be used for a very long time if properly maintained.

Kit includes instruction CD as well as some other modifications you need to do to increase the John Cooper Works intake airflow.

Lifetime warranty with a proven 4-5 HP gain. If your MINI is a turbocharged model and you have a JCW airbox with the JCW logo on the top then this filter should work. Always best to check before ordering



Great Replacement
Nicholas La Croix (Duarte, CA) 1/17/2014 8:33 AM
This is a great replacement filter for the JCW airbox. It was a breeze to put in, then when it came to the test drive the car was so smooth and had some serious pull. Would recommend this filter again and again! Thanks Madness!
Air filter is very nice. Love the sound
William Schmeltz (Camarillo, CA) 10/2/2012 9:08 PM
I installed this air filter this evening in about twenty minutes. I follow the installation video which is very well done. My car is a 2006 GP and I found the installation much easier after removing the top engine cover which is four bolts and all of two minutes. This makes the installation extremely simple. One note is to be careful with the vacuum line. Be sure to unplug that prior to moving the air-box too much. Love the sound that this filter gave my car. Have not driven at speed yet. That's tomorrow. Even if it does not feel any quicker it was worth it just for the sound :) Very nice filter and installation.
Good Replacement Filter
MiniMite (Irvine, CA) 2/17/2011 7:13 PM
I purchased this filter not because of the promised gains, but simply to replace my stock filter. I figured I may as well get a reusable one instead of something you have to throw away after use. This was worth the cost to me even without the potential performance boost. As for the performance gain, I'm not quite sure there is much difference. It feels a bit smoother accelerating, however that might just be because my old filter needed to be replaced. I wouldn't suggest this filter replacement merely for the performance gain. Some may feel a difference, some may not. I'm not seeing much difference in power, but it's a solid-quality replacement filter that is reusable. In the long run this will save you money, so there really is no reason not to get it. Installation was fairly simple. Getting it mounted onto the JCW intake top was the hardest part. Just remember to loosen the screw more than you think you should, then it will snap on. Overall, I'm pleased with my purchase. Ditch the paper filters for good and get something reusable, whether it's this filter or some other brand. NOTE : I already had the intake flap mod done with the paper filter. I DID notice a difference when I did this mod.
I wish I knew about this product sooner. I feel like I have a new toy!
Ronnie Silos (Valencia, CA) 12/2/2010 12:52 AM
After the Mini dealer told me it would cost $175 to replace my JCW air filter, I decided to browse around for alternatives. After I saw the video on this product, I decided, it seems simple enough and with the lower price and reusability of the filter and the added power, it was a no brainer. I'm not a mechanic and was able to perform the task in minutes just as the video explained. I have to say, the sound, the performance, the efficiency - IS SO SWEET! I should have done this the day it got out of the factory. This is a must have!!! Anyway, one warning - I would disconnect the vacuum tube off the filter housing first before lifting the housing. I made the mistake of lifting the housing before I removed the vacuum tube which disconnected the tube from the other end and I was careful. That was a nightmare and was my own fault. If you ever get in this scenario - you will not see where to reconnect it. You kinda have to feel for it around and there's not a lot of room there. It connects to a Y splitter looking thing somewhere under the manifold and is kinda just floating which makes it harder to reconnect. Avoid this and it really does just take minutes to implement the whole process. Anyway, it's all worth it. I feel like I have a new toy! It really does come alive. I'm baffled why JCW did not do this in the first place! When it's time to change your original filter, this is definitely the way to go. Thank you for the great video and the clear manual!
a Breathe-Right Strip for your MINI!
Ross Creasy (Vancouver, BC) 6/28/2010 4:36 PM
While it took a little longer to arrive than expected, just like Xmas morning it was worth the wait! The installation was easy, even with the JCW strut brace. Post install, the filter and corresponding airbox mod were like placing a breathe-right strip on the nose of a stuffed up cold suffer. the engine easily developed a smoother spool up and improved the acceleration! money well spent!

Product Videos

Madness Motorworks JCW high flow air filter install how to part 1 10:00

How to install the Madness Motorworks John Cooper Works high flow air filter replacement. Part 1

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    How to install the Madness Motorworks John Cooper Works high f...
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    How to install the Madness Motorworks John Cooper Works high f...

Product Reviews

Write Review

  1. JCW Intake High Flow Air Filter FLOWS 5 Star Review

    Posted by on 19th Mar 2020

    Awesome product. Easy install. Combine with oil change and you are ready to go. Immediate boost in performance!

  2. Install videos are great 5 Star Review

    Posted by on 17th Oct 2015

    Airbox removal was a little tricky, had to pull a strut brace out of the way. The videos are a big help, I had to watch them closely to check vacuum hose connections. Install went like the video. Liked the flap door upgrade.

  3. 06 jcw gp 5 Star Review

    Posted by on 11th Jul 2015

    works great faster pickup rock @ roll

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