Sprogley Motorsport Rear Brake Cooling Kit - BMW F8X

Sprogley Motorsport Rear Brake Cooling Kit to fit the BMW F80, F82 & F87 M2, M3 and M4.
 
Kit Includes
 
2x Rear Inlet Scoops
2x Rear Caliper Outlet Scoops
2x Rear Outlet Mounting Brackets
4x Stainless jubilee clips
2x Lengths of ducting
4x M8 Bolts
4x Genuine BMW Rear Caliper Bolts
Cablie Ties
 
Key Features
 
More than 15% cooling to the rear brakes
Tested on track with real-world data
Very simple to fit, completely reversible, and requires no modification to any factory components
Designed, tested and manufactured in-house, in the UK.
 
Rear brake cooling kit for the BMW F8X platform
 
When it comes to the rear brakes, you are very limited on options for brake cooling. As it is no easy task to remove the rear dust shield in place of a backing plate like the front cooling kit, it greatly limits the options for effectively cooling the rear. As a rear cooling kit had been requested by many of our customers, especially those who prefer the safety net of MDM, we spent some time scanning the whole rear section of our M2 development car to see what we could come up with.
 
Without drilling, cutting and bodging, there is no way of getting any air to the centre of the disk, so we turned our attention to the caliper. Off the back of our massive success with our AP caliper cooling scoops, we know that with good airflow and a properly designed kit, we can take a good chunk of heat out of the rear caliper and pads.
 
We have designed a complete rear cooling kit that ejects high-pressure cool air directly at the back of the rear caliper, using a low-profile, but relatively wide inlet scoop that fits directly under the car. With no access to the disk or pads directly, we wanted to test how effective cooling the caliper itself would be. Many touring cars, such as TCR, have cooling ducts that directly cool the caliper itself, so we went ahead and manufactured a prototype kit for our car and headed to the race track to test the concept.
 
The conditions on the day of testing were, in typical UK fashion, terrible. We had monsoons, hail, sun, wet track, dry track, and everything in between. With the very mixed conditions, we didn't even get a chance to fit the semi slicks, and chose to stay on our road / wet tyres all day. We ran the car with traction / MDM completely off, as we always do. I assumed that the relatively cool weather, track, and overall lack of pace would result in the rear brakes not getting hot enough to even register on the temperature stickers, but by the end of the day, we had some interesting data. We saw 143 degrees C on the caliper without the kit fitted, and 121 degrees C on the calliper with the kit fitted. A reduction of 22 degrees C, which is about 15%. From this data, we can safely assume that with a hot track, at full pace with semi-slicks or slicks fitted, this margin would only increase.
 
For a kit that is so simple to fit and remove, this was a fantastic result, and a perfect addition to our growing range of fully functional, tested brake cooling products for this platform. As with all of our products, every part of this kit has been developed, tested and manufactured by us.