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Joined: 14 Jan 2019
Posts: 33

PostPosted: Sun Sep 01, 2019 9:35 am    Post subject: Reply with quote

MisterCorn wrote:
If the calipers are the same as on the 996 then in terms of calipers with adapters, you are struggling for the 6 pistons used on the 996 turbo and I think the 997.1 as the bolt spacing is similar to what you have, just a bit wider.

These are the two setups I have produced. One is a modified Cayenne turbo with bracket to take 997.1 350mm GT3 disks. The other is a 997.2 GT2 caliper with bracket for 380mm disks. Note the much wider bolt spacing on the later GT2 calipers. The rears can use a simple spacer.

I would run these with a 27mm master cylinder.


Are the bigger 997 calipers plug-and-play with the spacers onto a 996.2 C2? IF yes, would you be interested in producing some for sale? I’m sure a lot of people would be interested.
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Joined: 08 Jan 2011
Posts: 7209
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Sun Sep 01, 2019 10:19 am    Post subject: Reply with quote

Yes they are, you can run the modified Cayenne ones on 18" wheels with 7mm spacers but the PCCB ones really need 19" wheels. I'll do a thread on them when I have the yellow ones on the car with wheels and tyres.

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Joined: 10 Sep 2018
Posts: 15

PostPosted: Sun Sep 01, 2019 10:15 pm    Post subject: Reply with quote

Hi Dagerous

I bought HiSpec 6-pots with 370x32mm rotors with Ferrodo DS2500 pads in the end. I say in the end because it seemed like I was waiting for most of this year for HiSpec to deliver........ They said they would deliver in 4 weeks but they took 10 weeks. I had to send the discs back because they didn't fit the hubs. After I got the discs back I then discovered the caliper mounting brackets didn't position the caliper central to the disc, so they had to make new brackets. All in all an absolute useless company. I wouldn't advise anybody to use them. I paid £2300 for months of false promises and agony.

I had read horror stories back in 2002 when I was building my Westfield kitcar but I thought 'it'll be fine, just a few bad stories on the internet'. How wrong was I. Their customer service is atrocious. I designed more of the brake kit than they did.

(Sorry for the rant, you did ask.... Smile )

Having said all that, I love the brake setup now. The car really hauls down and pedal feel is great. You can pin it to the apex with confidence. I wouldn't claim to know the in's and out's of other caliper manufacturers compared to HiSpec but I suspect any big disc setup (with appropriate size caliper pistons to master cylinder) with a decent pad would feel similar to what I have.

I also bought the GT2 plastic ducts. I'd be amazed if anybody could tell the difference between those and the standard Carrera ducts I removed but they were cheap and its cool to have a GT2 part on the car, haha.

If I was doing it again and I couldn't find a kit like what is being discussed above, after the heartache i had with HiSpec, I would quite happily pay £3340 for the Brembo GT 380mm kit.

Some pics to follow.

Hope this helps.

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Joined: 10 Sep 2018
Posts: 15

PostPosted: Sun Sep 01, 2019 10:17 pm    Post subject: Reply with quote

Some pics of my Hispec setup.

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