Mvez

yep, there's a reason the torque spec is high. Even on stud nuts, because they can back off too. Big fat sticky rear tires generate huge brake force on the 7GT3.

It held up for two sessions, I checked the nut after each session, but before the last one, it had worked its way too lose, and I called it a day, only lost one session in the end.

Studs, IMO, are a much easier solution than bolts. Tarret makes some nice kits, but my PMNA kit has been on the car for a couple seasons now with zero issues. My issues is simply that whoever changed rear pads on the car before I owned it (more than 3 years ago), must have damaged the original threads in the hub, as that stud won't take 54 ft/lbs anymore, but all other studs do just fine.

In reality, the ultimate solution is Time-Cert + Studs at all corners, as it creates a steel to steel mating, but I'm just going to fix the damaged hole and be done with it.

RacingBrake

Looking for a solution?
RacingBrake offers caliper mounting bolts made from 12.9 grade alloy steel and coated in DARCO to prevent corrosion.

Front 997 GT3set M12x1.5x75
Includes (4) Bolts



To view all the different sizes we offer click on the link below
http://www.racingbrake.com/category-s/7195.htm

bmwtye

What do these mounting bolts provide over the oem ones?

AudiOn19s

Did you read the thread?

How do these prevent the threads from stripping out of the wheel carrier? Are your bolts crappy in that they strip before the aluminum?

Texas RS

They should be stronger than the ones you got. I question whether you got true Porsche OEM bolts given the low break point of the ones you installed.

bmwtye

I know for sure mine are true Porsche OEM bolts that snapped

Alan C.

You can't have perfect metal parts every time. I investigated a rotating part from a jet engine that failed do to an internal cleanliness issue. That part was made from a vacuum induction melted ingot which was then processed as an electro-slag remelt ingot. It doesn't get any better yet one ingot out of hundreds had an issue. A review of the entire production process revealed nothing out of spec.

I'm surprised the vendor or retailer has no interest in seeing if there is a broad problem or if it just a fluke.