Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png +443456003478 https://www.design911.co.uk Facebook Instagram
Check vehicle fitment
991008673
Product Information
Product Information

High Temperature Performance Brake Caliper Seal Kit Upgrade Kit 30mm
1 kit per caliper - 2 required per car

Upgrade and restore your Porsche braking system with this High Temperature Performance Brake Caliper Seal & Piston Upgrade Kit, specifically developed for Porsche 991 GT3 and Porsche 991 GT3 RS models.

Fits:

  • Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
  • Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
  • Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19

Part of the advanced Performance Range, this premium caliper rebuild kit combines replacement pistons with upgraded high-temperature sealing components, delivering exceptional durability, reliability, and braking consistency under the most demanding driving conditions.

Kit Contents
• 6 x 30mm Pistons
• 6 x 30mm Performance Dust Seals
• 6 x 30mm Performance Piston Seals
• 2 x Bleed Nipple Dust Covers

Designed for fast road driving, track-day use, club motorsport, and high-performance Porsche applications, this kit helps maintain optimum brake caliper performance when subjected to repeated heavy braking and extreme operating temperatures.

Unlike conventional rebuild kits, the Performance Range incorporates upgraded silicone dust seals and enhanced thermal-resistant piston seals specifically engineered to withstand the elevated temperatures generated by GT3 and GT3 RS braking systems.

Performance Range Key Advantages

High-Temperature Silicone Dust Seals

Performance Range kits utilise premium silicone dust seals in place of conventional OEM-style EPDM dust boots.

Benefits include:

• Superior resistance to elevated brake temperatures
• Improved flexibility during repeated thermal cycles
• Enhanced durability during aggressive driving and track use
• Reduced risk of heat-related seal degradation
• Improved protection against dirt, moisture, and contamination

Enhanced Thermal-Resistant Piston Seals

The piston seals are manufactured from an upgraded EPDM compound specifically developed for high-performance braking environments.

Advantages include:

• Increased thermal resistance
• Improved sealing performance under load
• Enhanced long-term durability
• Greater resistance to heat-induced fatigue
• Consistent caliper operation during repeated heavy braking

Why Choose the Performance Range?

The Porsche 991 GT3 and GT3 RS are designed to operate at the highest levels of performance, generating enormous braking loads and temperatures during spirited road driving and track use.

The upgraded materials used throughout the Performance Range help maintain brake caliper integrity and sealing performance when exposed to:

• Repeated heavy braking cycles
• Extreme brake temperatures
• Fast road driving
• Track-day environments
• Motorsport-inspired applications
• Competitive driving conditions

This makes the kit an ideal preventative maintenance upgrade for owners seeking enhanced reliability and durability from their Porsche braking system.

Ideal Applications

Perfect for:

• Porsche 991 GT3
• Porsche 991 GT3 RS
• Fast road driving
• Track-day use
• Motorsport-inspired builds
• Club racing applications
• Performance brake system rebuilds
• Vehicles subjected to repeated heavy braking cycles



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

991008673
99135191380

The product you are viewing cross references to these numbers
Related products