If you’re just going to run on one pad for both the street and the track/AX, I’d suggest you try the Pagid (“Dark Blue”) Sport Pads, or some equivalent from one of the other manufacturers. They are a good compromise of bite, fade resistance, and pad/rotor wear. Very similar to what street exotics and high performance specialty cars run. I ran on them for street/AX/DE with good results for many years.
If you’re going to brake REALLY hard at track events (and some of us DO) and you’re willing to switch pads out for track events, then either the Pagid or Performance Friction Brake pads are good (and will be more expensive). I don’t recommend running them on the street, as they will be very noisy, take more time to heat up and develop bite, and on some of them the dust is corrosive to wheel finishes (when combined with water). Plus you’ll want to save your expensive race pads for the track.
In Pagid Sport/Race pads, the base Boxster takes pad type 2407 front, 2406 rear. Here are two places I have bought them from in the past:
http://www.ebsracing.com/content.wws?fname=porsche-pagid-brakes.htmlhttp://www.velocityspot.com/servlet/the-Pagid-Race-Pads-cln-Porsche/s/26/CategoriesIn the PFB pads, the base Boxster takes part number 0737.XX.16.44 front, 0738.XX.16.44 rear (where “XX” is the pad compound, 97, 01, or 06). I usually by them from RotorsandPads.com unless OGRacing has them on sale:
http://www.rotorsandpads.com/search.aspx?keyword=0737,0738If you go with Race Pads, you will need to develop an opinion about which pad compounds you want to use. There are several tradeoffs regarding torque, temperature range, release characteristics, pad and rotor wear, etc. I am currently using the PFB racing pads which have the best wear and are relatively easy on the brake rotors (type “97”) and they work great. A lot of Porsche guys like to put grabbier pads on the rear to shift the braking bias towards the rear and/or take advantage of staggered tire setups, and I am starting to come to the conclusion that (at least my) Boxster’s brakes are heavily biased towards the front brakes as well, so I’m going to try the slightly grabbier PFB type “06” on the rear.
PM me if you want to dig into this in more detail.