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Cross-drilling and slotting help in releasing gas build-up between the pad and disc during hot-n-heavy breaking. They also allow water to be channeled away more quickly. The vented ones can also help in the cooling of the disc during heavy use. No, venting a disc will not crack it unless you use your T3 to race and brake a LOT, constantly! Vented discs help in cooling the disc but nobody makes such a disc for our cars. I would believe the reason is the small thickness of our discs, and thus calipres, when compared to vented discs which, overall, are much thicker. Is it worth it? Well, I know that disc pads can come with a slot in the middle of the pad and this helps with gassing and water dispersion. For the stock T3 a slotted pad and the stock brakes are very good. My discs are cross-drilled to help cool them but since I have done no formal testing I cannot say whether this has helped or not. I do know that my wet weather braking is better. As a custom modification, cool looks and inexpensive cost all factored together I think it was worth it. I had mine done by C.H.Topping & Co. located in California. At the time it was $35/rotor. They do chamfer the holes. Give them a ring at (562)432-0901. Toby Erkson air_cooled_nut@pobox.com <-- Please use this address for email '72 VW Squareback 1.6L bored and stroked to 2.0L, Berg five-speed '95 VW Jetta III GL 2.0L, P-Chipped, Jamex sport suspension Portland, Oregon, http://www.icbm.org/ >-----Original Message----- >What do you guys think about having front discs cross drilled >or vented or >nothing at all?? It weakens the strength of the disc right? >is it worth it? how much can i expect to pay? ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org