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Porterfield Racing Brake Pads — Race Proven Performance
Porterfield GD557
Image of what an axle set is. 2 pads per wheel, 2 wheels equal axle set

Porterfield

Porterfield GD557 Brake Pads

SKU: SKU: GD557 R-4

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Porterfield Brakes are race-bred friction designed and proven on the track. Each set is precision-cut from premium friction material and developed for high-temperature durability, fade resistance, and consistent pedal feel.

Available Compound Options for this Fitment:

  • R-4 — The original road racing compound that is very rotor friendly and easy to modulate. Medium friction with a 0–1200°F temperature range; optimum 350°F–900°F. Not for street use.
  • R4-E — The Endurance compound. Slightly lower friction than the R-4 but designed to wear longer for endurance races (4–6 hour). Characteristics are otherwise much the same as R-4. Not for street use.
  • R4-1 — The Vintage compound. Designed for vehicles that struggle to keep heat in the pads. Best when temps are under 600°F and peak temps stay below 1000°F. Also popular as an autocross pad. Not for street use.
  • R4-S — The performance street pad. Lowest dust and squeal of any street pad in the Porterfield line, very rotor friendly, and lasts as long as (or slightly longer than) stock pads. Not for track use. Not for use with CCM discs.

Vehicle Fitment

Axle Set of 4 Pieces REAR

Make Vehicle Applications
Ac 63-68 Cobra, 1958 Two Litre
Alfa Romeo 63-68 2600, 1963 Giulia, 1963 Giulia Sprint
Aston Martin 63-65 DB5, 65-70 DB6, 67-71 DBS, 69-89 V8, 79-89 Lagonda, 72-74 Vantage, 1989 Virage, 78-89 Volante
Delorean 81-83 DMC-12
Ferrari 68 275GT, 67-68 275GTB, 67-68 275 GTS, 67-68 330 GT, 67-68 330 GTC, 67-68 330 GTS, 67-71 365GT, 72-75 365 GT4, 69-73 365 GTB/4, 68-72 365 GTC, 68-70 365 GTS, 70-74 365 GTS/4, 67-69 DINO 206 GT
Jaguar 67-68 420, 82-86 Vanden Plas, 68-71 XJ, 73-86 XJ12, 73-87 XJ6, 1993 XJRS, 76-93 XJS, 69-74 XKE
Lamborghini 64-67 350gt, 68-69 Espada, 68-70 Islero, 1970 Jarma, 66-70 Miura
Maserati 61-64 3500gt, 67-73 Ghibli, 69-74 Indy, 74-79 Khamsin, 66-73 Mexico, 68-70 Mistral, 64-70 Quattroporte, 63-66 Sebring
Shelby 63-68 Cobra

All Porterfield Brakes products carry the manufacturer's standard warranty. Race compounds are not for street use.

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