Wilwood just got done with the front brake setup. I purchased two kits for sema vehicles I'm working on but I’m working a different direction and have a extra kit for sale (if interested). Otherwise to the reliability of wilwood products I've been using them on my mustangs for years now and find them to be as superior to baer or brembo. Only down fall is the bolts they use on the calipers sometimes rust but otherwise their 6 pot kits are bad ass. I got the new kit, 6 pot front calipers with 14" front cross-drilled rotors. The kit was 2200.00 new. Also to a statement above I've been using cross-drilled rotors for years without issues. tracks I've attended are Gingerman, beaver run, indy. I've seen these things glowing and popping brake pad out of the holes but never a crack.
Its an incrediable system. Most the time brembo and baer kits are more. I'll ditch the second one for a lower price if anyones interested. As soon as I get the first kit installed I'll get some pics up.
Not only does cross drilling induce cracking, but it also defeats the purpose of upgrading brakes. No longer do pad materials create the gases that holes were meant to release. Now all the holes do is reduce the surface area.
Funny enough, if you consult most of the companies' sites listed in the previous replies, all the top kits include slotted discs in order to prevent gas buildup between the pad and the disc during hard braking. They also claim that it helps remove glazing from the pad surface after hard use of the brakes. The last one I can attest to : after numerous problems with the original discs of my '02 Acura TL-S (go visit any TL-S site: transmission and brakes are the two common problems with that car), I changed the front OEM discs to a set of Viper slotted/perforated discs front, and never had a problem anymore. I also changed the pads, but I can't remember the brand - kept the original front calipers. I overheated my front brakes (I won't tell you how and why, but let's say it was not what Acura had in mind when they built that car!), they were really glazed, but the "no brake" feel disappeared by itself by what I think was just regular braking, this within two days without having to remove the darn pads to sand them.
Really???? I didn't find that info. I don't want to delve into an over technical discussion of rotors, but i also do not want false information posted for unsuspecting forum readers. Here are links to the companies referenced in this thread. They all support what I said. Slots wipe debri, but our rotors are fairly secure from debri. slots are more for cars with no shields and exposed rotors. Cross drilled is all about the bling factor http://www.wilwood.com/Centers/Information/question_answer/07.asp http://baer.com/cgi-bin/htmlos.exe/00419.2.3359321878700027405 http://www.stoptech.com/faq/data/faq15.html