Cravenspeed Supercharger Pulley 15% Reduction

Extremely well made. It is one of the best pulleys I have ever felt. In case you didn't know what you are looking at, this is a reduction pulley for the Mini Cooper S supercharger. It is claimed to add 15-20 whp and after installation, I believe it. The tapered design makes it extremely easy to go on (getting the old one off is a little difficult). This is a great pulley at a decent price. One thing I want to note, if you are doing this mod, it is extremely recommeded to get a colder spark plug:https://www.amazon.com/gp/product/B001B6VUQK/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1Also, I would strongly recommend using the designated puller even if it is costly:https://www.amazon.com/Cravenspeed-Quick-Puller-Pulley-removal/dp/B00X4MUJ2K/ref=sr_1_15?s=automotive&ie=UTF8&qid=1469471858&sr=1-15&keywords=cravenspeed

My favorite reduction pulley for the r53 on the market. Cravenspeed makes good stuff. Makes great, reliable horsepower. No tune needed. You will need a smaller belt tho.

Great mod, should've done this year's ago. 02 MCS. Makes everything sound better and the performance is surprising. Bought the pulley tool, made the install painless.

The materials are not great could have went with a tougher metal.

This pulley is beautiful. Very high end craftsmanship with no sharp edges and Cravenspeed logo etched in. Packaged very nicely with padding to avoid scratching. Performs wonderfully on my Mini R53. The only thing is the pulley has 4 hex bolts and the online instructions refer to 3 hex bolts that need to be tightened to 85lbs torque. Seemed kinda high to me so I only used about 40lbs torque. Working fine. No slippage. Remember to get the right belt size for your upgraded pulley otherwise your stock belt will be slipping.

I purchased this pulley as a way to make gains on my R53. It did the job but put up a fight to get there. The lack of information and instructions on properly seating the pulley causes misalignment issues that resulted in shredded serpentine belts. I had to take the belt and tensioner to measure the alignment between the supercharger and the alternator to track down the issue. Also be sure to get the colder plugs definitely a need.

I installed this on my 2008 r52 Convertible with an automatic transmission. Search on YouTube for the instruction video from Mod MINI. Also you WILL need the pulley puller that they sell!This looks intimidating to install but if you watch that video and follow step by step you'll be fine. I almost returned this because the install looked out of my depth but I needed to install a new belt tensioner so figured that while I was doing that, I might as well do this since it's really only a few more minor steps. I am REALLY glad that I made that decision! This thing really wakes up your ride! I was easily tripping the traction control and the sound of the supercharger is AMAZING!Combined with their lightweight crank pulley, this is definitely a mod worth installing!

I installed this and my Mini feels like a different machine. I absolutely love it. My Mini is a daily driver, but it just more fun with this pulley installed. I also installed a Detroit Tuned bypass valve and it has made a huge difference to the performance of my car. I highly recommend this mod even if it's the only upgrade you install. Great bang for the buck.