The DS2500 is currently the best hybrid track/street pad on the market. It features the moderately high bite and solid fade resistance of a track pad, with the relatively low dust and noise levels of a street pad. When used as a street pad, it can produce some squeal on certain vehicle platforms. During aggressive driving the DS2500 is known for its flat torque curve, which means as temperatures go up, the response through the brake pedal remains consistent. If you drive aggressively on the street, do some canyon runs, autoX, and maybe some light track duty on street tires, the DS2500 is tough to beat.
When used on fast, heavy cars on the track with race tires, pad wear rates tend to be higher than some of the full track pad compounds. Under those conditions, HPA would recommend the Ferodo DS3000 or DS1.11.
E82 135i
Front pads: $274
Rear pads: $197
To purchase:
http://www.hpashop.com/Ferodo-135i-B...s-e82-135i.htm
If you are bleeding your brakes on your own, don't forget this great tool:
https://www.amazon.com/gp/product/B0...2bfb11e1159052