Brake support mounting & plates kit. Rear Porsche 911 1974-89  ❭  91135208130

Brake support mounting & plates kit. Rear axle.
This OE Match kit brings together all critical components involved in supporting and protecting the rear brake caliper and disc area. It includes the main structural mounting plates, protective disc cover plates, and the correct genuine Porsche bolts, washers, and nuts needed for proper installation.


Porsche 911 1974 - 1977 2.7L / 1976-77 3.0 Carrera
Porsche 911 1978 - 1983 3.0L / SC
Porsche 911 1984 - 1986 3.2L
Porsche 911 1987 - 1989 3.2L G50

Diagram ref no. 3, 4, 5, 6 and 15

This kit includes:
2 × OE Match Brake Support Mounting Plate - OE Ref: 91135208130
2 × OE Match Rear Brake Disc Cover Plate - OE Ref: 91135280120
4 × Genuine Porsche Hex Head Bolt (M8 × 16) - OE Ref: 90007508704
4 × Genuine Porsche Washer - OE Ref: N0122418
4 × Genuine Porsche Hexagon Nut - OE Ref: 9000760250C

Together, these components:
•  Provide a rigid and correctly aligned mounting base for the rear brake calipers
•  Protect brake discs and surrounding components from debris, dirt, and road contamination
•  Ensure accurate caliper positioning relative to the brake disc
•  Restore factory-correct hardware and fastening integrity
•  Support consistent braking performance and even pad wear

This kit is ideal for brake overhauls, restorations, or when replacing corroded or damaged original mounting hardware.

Function:
•  Brake support mounting plates: Anchor and align the rear brake calipers
•  Disc cover plates: Shield brake discs and hubs from debris and moisture
•  Genuine bolts, washers & nuts: Ensure proper torque, clamping force, and long-term fastening security
•  System integrity: Maintains correct brake geometry and mechanical stability

Over time, rear brake mounting plates and disc covers are prone to corrosion, deformation, and fatigue, especially on classic vehicles. Worn or damaged hardware can lead to:
•   Misaligned brake calipers
•   Uneven brake pad wear
•   Increased brake noise or vibration
•   Reduced braking consistency

Replacing these components as a matched kit ensures the rear brake system is securely mounted, properly protected, and restored to original operating standards.

When to replace.  Replace or install this kit when:
•  Performing a rear brake overhaul or restoration
•  Original mounting plates or disc covers are rusted or damaged
•  Fasteners are corroded, stretched, or missing
•  Brake alignment or caliper stability issues are present
•  Refreshing suspension and brake hardware together

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91135208130

The product you are viewing cross references to these numbers