Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

FRONT BRAKE ROTORS – for my 996 Mk II 2004 GT3 (ie with the larger 6 p


Recommended Posts

Need a new set of FRONT BRAKE ROTORS – for my 996 Mk II 2004 GT3 (ie with the larger 6 pot calipers)

Have been getting 6 moths use only from the OEM Sebro’s.

Cracking from the very outside ventilation holes close to edge of rotors, plus cracks between the holes.

I’m typically only doing short sprints, time trials etc – or 8 lap races (9/10 minutes) – at most

- So fade, heating not a huge issue

More focussed on getting some good life from the rotors – but still reasonable bite factor etc.

OEM Sebros are DRILLED of course – I hear SLOTTED rotors are better as no issues with the cracks between the ventilation holes

- But these heat up easier? Provide the same grip/bite factor?

Appreciate thoughts..........recommended suppliers?



Link to comment
Share on other sites

    You can remove these ads by becoming a Contributing Member.

Try Evoms. They have a Brembo slotted rotor kit for the track.. The kit comes with the calipers as well which you don't need. Call them and see if the rotors will work with your calipers and if they sell the rotors seperately..


Link to comment
Share on other sites

  • 2 months later...
  • 3 months later...

Have you measured the cracks? There is a Porsche spec sheet that allows the cracks up to 7mm, if I remember correctly. IMHO, the rotors are awful expensive to replace if they are still in spec. Then again you can't put a price on peace of mind.

Link to comment
Share on other sites

  • 3 weeks later...

Many people (myself included) use the ATE slotted rotors for the Cayenne with the large brake option (350mm). They fit perfectly but they do not have the little screw hole for the locating screw (not a problem at all). The upside is they are a fraction of the cost ($130/each) and seem to last much better than the drilled ones. At least one website even lists them for this application:


Link to comment
Share on other sites

  • 3 weeks later...
  • 3 weeks later...
  • 1 month later...

Not to add to the confusion, but when you plug the part number from the factory (996 351 409 9H) into any retail web site (pelican, auto atlanta, etc) you get prices averaging 500 bucks a side. I know they are 350 mm but what else is compatible? The GT3 Cup rotors (996 351 410 9J M294) show up as 350mm x 33mm. They are also FAR less expensive ($205 a side). Enter the "updated" part number for the 997 (997 351 410 90 M294) shows up at about $350 per side but they are 350mm x 34 mm. I am confused and don't want to waste money. If the Cup rotors will work/last 80-90% as long for 67% of the price, it's a pretty good deal...can someone help me sort this out? Thanks!

Link to comment
Share on other sites

  • 4 months later...

Check out the aftermarket Cayenne S rotors, they fit fine and work great on the track. Just keep your brake fluid fresh and you shouldn't get any fade. They are a bit heavier than stock but at the price I paid (about $100 each on Ebay) they are a no brainer. I previously ran Brembo GT floating rotors and even at high speed tracks like Road America I have not had any problems. Save your money for Hoosiers!!

Link to comment
Share on other sites

  • 1 year later...
  • 2 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.