Brake Compound Reviews

Mintex & Portfield R4-S:  Mintex and Porterfield are both reputable performance brake pad brands often compared for street and light track use. Porterfield (especially R4-S) is generally regarded as having superior initial bite, lower dust, and much better rotor friendliness.However,  Mintex (especially C-Tech/M1144) offers strong performance while producing more dust or noise.

Performance: Both provide better stopping power than stock pads.
Dust & Noise: Porterfield R4-S is often praised for being low-dust, while Mintex is sometimes noted for producing moderate dust.
Rotor Wear: Porterfield is known for being gentle on rotors.
Application: Both are excellent choices for sports cars. , with Mintex having a long racing heritage and economical and Porterfield being more popular for high-performance street/autocross.

Conclusion: For many users, Porterfield is preferred for a better balance of performance and low maintenance (dust) on street cars.

EBC Greenstuff  pads are generally considered a budget-friendly, street-performance upgrade offering good initial bite with low dust, suitable for daily driving and light track use. In comparision, Porterfield (R4-S) pads are often praised for superior, consistent, and durable, yet higher-priced performance, often favored for spirited street or mixed-use driving. EBC Greenstuff (Street Performance):

Performance: Designed as a moderate upgrade over stock, providing a good initial bite with minimal noise and low dust.
Usage: Ideal for daily driving, commuting, and lightly spirited street driving on passenger cars and lighter trucks.
Pros: Generally lower cost, low dust, good bite without needing high heat.
Cons: Not suitable for serious track racing (where Yellowstuff or higher is needed).

whereas......

Porterfield (R4-S Street/Race):

Performance: Known for excellent, consistent, and smooth stopping power with a good, progressive pedal feel.
Usage: Highly regarded for high-performance street, autocross, and light-to-medium track work (R4-S compound) and longer lasting
Pros: Extremely rotor-friendly, low to moderate noise, excellent "bite" from cold.
Cons: Generally more expensive (often 2x-3x) than entry-level pads, with very low dust.

Conclusion: For daily driving on a budget with a noticeable upgrade over stock, EBC Greenstuff is a solid, popular choice. For enthusiasts seeking better, more consistent performance and superior feel, and who do not mind a higher price point, Porterfield R4-S pads are preferred.

Racing Compound Generally

Compounds used for racing aspplicationsd have different priorities and a different environment than road-going sports cars need. Racing brake compounds are specifically engineered to maintain a high, consistent coefficient of friction under extreme heat (often exceeding 800-900°C which is extremely diffeent from road going light sports cars. They racing variant are subject to brutal, repeated braking, prioritizing performance over noise, dust, and longevity. Race pads and shoes require a high operating temperature (above 200-300°C) to begine to work effectively, meaning they perform poorly when cold..presenting a higher risk when used on a road-going car.
Pure race pads have poor cold performance. If the pads do not reach their minimum operating temperature (e.g., during a parade lap or in the pits), they may not provide adequate stopping power. They should never be used on a road going car. However, the reverse is not the case.

Wear and Noise: Racing compounds have a shorter lifespan than street pads under normal driving and are very noisy and dusty.
Rotor Wear: While some compounds are labeled "rotor-friendly," racing pads are generally more abrasive than street pads.