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Pad review /// STREET + TRACK

Porterfield R4-S

Carbon-kevlarStreet + track

A cult favorite: strong cold bite and smooth release, brilliant for autocross and canyon roads.

Spec sheet

Compound familyCarbon-kevlar
Duty classStreet + track
Operating window0–580 °C
Street useYes
Typical price$$$$ · $80–140 / axle
Operating window
0°C300600900°C
Works from 0°C to 580°C

Character ratings

Bite / stopping power7
Fade resistance6
Cold performance8
Quietness7
Low dust5
Pad life6
Rotor friendliness8

The verdict

Best for: Autocrossers and spirited street drivers wanting instant cold response.

The trade-off: Heat ceiling sits below true track pads — long sessions will find it.

Reading the numbers

Standout traits: cold performance (8/10), rotor friendliness (8/10).

No outright weak axis for its intended duty.

Ratings are brakepadfinder.com's editorial synthesis of manufacturer specs and long-term community consensus. Character guidance, not lab data.

Six pads to compare this with

Six are other street + track pads. Inside each group the pad whose heat ceiling sits closest to this one's 580°C comes first.

EBC Brakes
Yellowstuff
$90–170 / axle · max 650°C · 6.6/10
Hawk
HP+
$90–160 / axle · max 650°C · 5.3/10
Ferodo
DS2500
$120–200 / axle · max 700°C · 6.8/10
Endless
MX72
$250–400 / axle · max 700°C · 7.6/10
EBC Brakes
Bluestuff NDX
$110–190 / axle · max 750°C · 6.3/10
Project Mu
HC+
$200–330 / axle · max 800°C · 6.1/10

Is this your pad?

Confirm exact fitment for your year, model and trim in the manufacturer's catalog — then bed them in properly.

Porterfield catalog ↗ Buy in the US ↗ Partner link Buy in the UK ↗ Partner link Run the finder →

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