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911BILLETCALIPERKIT300MM
Product Information
Product Information

Billet Aluminium Brake Caliper Kit with 300mm Front Discs - Front and Rear

Upgrade the braking performance of your classic Porsche 911 with this high-performance billet aluminium brake kit featuring lightweight 6-piston front calipers, 4-piston rear calipers and larger 300mm front brake discs.

Fits:

  • Porsche 911 1965-1968 2.0L / 912 SWB (F)
  • Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • 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

Kit Contents
• 2 x 6-piston billet front calipers with mounting brackets
• 2 x 4-piston billet rear calipers
• 2 x 300mm front brake discs
• 2 x 3.2 rear brake discs
• 1 x Ferodo DS3000 front brake pad set
• 1 x Ferodo DS3000 rear brake pad set
• 2 x braided front brake hoses
• 2 x braided rear brake hoses

Please Note – These calipers are not suitable for use with the turbo/930 rear arms

Designed for fast road, track, and bespoke motorsport builds, this advanced brake package has been successfully fitted to numerous classic Porsche 911 projects over the last decade.

Designed and manufactured in the UK, each caliper is precision-machined from aerospace-grade T6 billet aluminium alloy for exceptional strength, rigidity, and weight reduction.

The stainless steel pistons are specifically optimised for compatibility with the Porsche 911 master cylinder, while the internal fluid transfer design improves reliability and removes the need for external crossover pipework.

With front calipers weighing approximately 2.8kg and rear calipers around 2.2kg, this system significantly reduces unsprung weight compared to standard Porsche brake components. Combined with the larger 300mm front discs, the result is improved braking performance, sharper pedal feel, enhanced heat management, and greater confidence under demanding driving conditions.

This kit is designed to deliver modern braking capability while maintaining compatibility with classic Porsche 911 chassis and suspension configurations.

Key Features

• Billet aluminium brake caliper kit for Porsche 911
• Suitable for Porsche 911 models from 1965-1989
• Lightweight 6-piston front calipers
• Lightweight 4-piston rear calipers
• Larger 300mm front brake discs included
• Precision-machined from aerospace-grade T6 aluminium
• Stainless steel pistons optimised for Porsche master cylinder compatibility
• Internal fluid transfer design for improved reliability
• Significant reduction in unsprung weight
• Designed and manufactured in the UK
• Suitable for road, fast road, and motorsport applications

Lightweight Motorsport Brake Engineering

Reducing unsprung weight improves suspension response, steering precision, and overall vehicle dynamics.

Compared to standard Porsche brake systems, these billet aluminium calipers offer:
• Faster steering response
• Improved suspension control
• Enhanced braking modulation
• Reduced brake fade
• Greater heat dissipation during aggressive driving

The larger 300mm front discs further improve stopping performance and thermal capacity for demanding road and track use.

Why Upgrade to a Billet Brake System?

Standard brake systems can struggle under modern performance driving conditions.

This upgraded system provides:
• Increased braking power
• Improved pedal feel and consistency
• Reduced overall brake weight
• Better cooling and heat management
• Motorsport-grade durability and reliability



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

911BILLETCALIPERKIT300MM
91135142603
91135242500
91135242600
91135142502
91135142602
91135290700
91135290800
91135180900
91135190700
9113519360
91135193600

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