PCCB Brake Disc Versions

Porsche vehicles have been equipped with different types of (Porsche Ceramic Composite Brake) PCCB brake discs ever since PCCB brakes were first introduced (on 911 Carrera 4S, 911 Turbo, 911 GT2, 911 GT3 - before 2005 models). Specifically, these brake discs are either based on original technology (3 K version) -A-  or modified technology (MFF version) -B- 

Modified technology brake discs (MFF version) -B-  and also some original technology brake discs (3 K version) -A-  are and have been fitted to the 911 Carrera 997 (contrary to previous announcements and publications).

Fundamental (notwithstanding small modifications) Notwithstanding this, there may occasionally be small modifications made to the two technologies).

Ensure that brake discs manufactured using the modified technology -B-  (used in the 911 Carrera 997 since production began) are not interchanged with the brake discs manufactured using the original technology -A-  (911 Carrera 4S, 911 Turbo, 911 GT2, 911 GT3 - before model 2005). Distinguishing feature: Twice as many bars between the friction surfaces on modern (modified technology) brake discs -B-  and different perforation bore pattern.

1. Original technology (3 K version)
2. New technology (MFF version)
   Fig 1: Identifying PCCB Brake Discs

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

PCCB design versions on 911 Carrera (997) (optional equipment 450):

I 751 = PCCB with original technology brake discs (version 3 K) on front and rear axle

I 752 = PCCB with original technology brake discs (3 K version) on the rear axle and new technology (MFF version) on the front axle.

Install modified technology brake discs only on the 911 Turbo (997) and 911 GT3/911GT3 RS (997) -B-  .

The following general rule applies to PCCB brake discs: A combination of the two technologies -A and B-  on the same axle is not permitted! A front axle/rear axle mix of the two technologies -A and B-  is possible.

In addition, -B-  modified technology brake discs also feature wear indicator plates on the friction surfaces. The wear indicator plates (six on each brake disc) are arranged close to the outer diameter, offset by 120 ° -arrows-  at three points. The three wear indicator plates on each friction surface (3 on the inside and 3 on the outside) are positioned directly opposite each other. Each wear indicator is approx. 1.2 cm² . The wear indicators are barely visible on new brake discs.

Fig 2: Identifying Original (A) And Modern (B) Brake Discs

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The wear limit (brake disc minimum thickness) is also different on -B- modified technology discs. The minimum brake disc thickness (wear dimension) is stamped on the brake disc hub (e.g. Min. Th. 33.7 mm).

Fig 3: Locating Wear Indicators

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Porsche vehicles have been equipped with different types of PCCB brake discs ever since PCCB brakes were first introduced (on 911 Carrera 4S, 911 Turbo, 911 GT2, 911 GT3 - before 2005 models). Specifically, these brake discs are either based on original technology (3 K version) -A-  or modified technology (MFF version) -B- 

Modified technology brake discs (MFF version) -B-  and also some original technology brake discs (3 K version) -A-  are and have been fitted to the 911 Carrera 997 (contrary to previous announcements and publications).

Fundamental (notwithstanding small modifications) Notwithstanding this, there may occasionally be small modifications made to the two technologies).

Ensure that brake discs manufactured using the modified technology -B-  (used in the 911 Carrera 997 since production began) are not interchanged with the brake discs manufactured using the original technology -A-  (911 Carrera 4S, 911 Turbo, 911 GT2, 911 GT3 - before model 2005). Distinguishing feature: Twice as many bars between the friction surfaces on modern (modified technology) brake discs -B-  and different perforation bore pattern.

1. Original technology (3 K version)
2. New technology (MFF version)
   Fig 1: Identifying PCCB Brake Discs

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

PCCB design versions on 911 Carrera (997) (optional equipment 450):

I 751 = PCCB with original technology brake discs (version 3 K) on front and rear axle

I 752 = PCCB with original technology brake discs (3 K version) on the rear axle and new technology (MFF version) on the front axle.

Fig 2: Identifying Original (A) And Modern (B) Brake Discs

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Install modified technology brake discs only on the 911 Turbo (997) and 911 GT3/911GT3 RS (997) -B-  .

The following general rule applies to PCCB brake discs: A combination of the two technologies -A and B-  on the same axle is not permitted! A front axle/rear axle mix of the two technologies -A and B-  is possible.

In addition, -B- modified technology brake discs also feature wear indicator plates on the friction surfaces. The wear indicator plates (six on each brake disc) are arranged close to the outer diameter, offset by 120 ° -arrows-  at three points. The three wear indicator plates on each friction surface (3 on the inside and 3 on the outside) are positioned directly opposite each other. Each wear indicator is approx. 1.2 cm² . The wear indicators are barely visible on new brake discs.

Fig 3: Identifying Wear Indicators

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The wear limit (brake disc minimum thickness) is also different on -B-  modified technology discs. The minimum brake disc thickness (wear dimension) is stamped on the brake disc hub (e.g. Min. Th. 33.7 mm).