Audi RS2/Porsche 993 "Big Red" Brake caliper template

[T Bo]

Hi all,
I have been searching for a brake caliper template for the Audi RS2/Porsche 993 "Big Red" Brake caliper (part no's. 993.351.425 / 993.351.426), with no success ! Any ideas where I could get one ? I want to check whether these calipers would fit in my wheels. (new 17 inch alloys to be installed on the car)

[Tractor Dave]

I can take some measurements on the car for you if that helps?

[T Bo]

That would be really helpful thanks.

[Tractor Dave]

No problem. I will report later. My car has 17" standard Porsche Rs2 wheels. I will also measure the internal diameter of those.

[T Bo]

Great, thanks again Dave.

[Tractor Dave]

About 74mm from outer edge of caliper to centre of hub bolt.


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[T Bo]

Great work. Could I also trouble you for the approx "thickness" of the caliper (distance from the rotor face to the outer edge of the caliper (see blue line on the attached picture). No hurry on this !

[T Bo]

Sorry, and perhaps the approx length as per the blue line in the attached photo. No more questions, I promise !

[Colesy]

Those calipers with 323mm A8 discs fit under all 17" wheels I have ever tried. The 314mm A8 discs with the correct brackets fit under OEM 16" wheels too.

So you should fine as long as you don't go for more than ~323mm discs. What wheels have you bought?

[Tractor Dave]

Approx 295mm



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[Tractor Dave]

Approx 40mm



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[T Bo]

Great stuff Dave. Much appreciated.

[T Bo]

Those calipers with 323mm A8 discs fit under all 17" wheels I have ever tried. The 314mm A8 discs with the correct brackets fit under OEM 16" wheels too.

So you should fine as long as you don't go for more than ~323mm discs. What wheels have you bought?

I will be getting 323mm discs from A8. The wheels are made in Australia, which is where I live, by a company called Koya. Custom made to your specs. They should be OK as are big brake compatible. I just don't want to risk having to return items as international postage is significant. Thanks a lot for your advice, I'm confident now that all will fit. Tom.