[HP Autosport]

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[HP Autosport]

R4-S

High Performance Street Brake Pads

For high performance and heavy duty street conditions the Porterfield R4-S compound re- mains a top performer in the realm of street/performance brake pads. With the R4-S compound giving a friction level up to .41. This is an amazingly fast stopping brake pad. Simply put, they will give you an impressive increase in stopping ability with very minimum amount of pedal effort. Perfect for prolonged everyday street driving while also being capable of enduring the most se- vere use without fade. It is also rotor friendly of course.

We have gone to great measures to ensure that the R4-S compound has the absolute low- est noise and dust levels possible, far below O.E.M. equipment or any other high performance brake material. The R4-S compound which has an overall win in the Baja 1000 is available for most models of cars, trucks, and SUV’s. Superb stopping power under heavy use. Great for occasional autocrossing, solo events, off road events and rallies. Perhaps one of the overall best performing, clean and quiet everyday high performance driving brake pad ever made.

Porterfield R4S

AP2478

AP1850

Application:

G8X M2 M3 M4

[HP Autosport]

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[HP Autosport]

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[M2M3M3]

I haven't tried these on a G87, but they worked great on my Type114 M2.

Very popular compound in the vintage community.

[HP Autosport]

Originally Posted by M2M3M3

I haven't tried these on a G87, but they worked great on my Type114 M2.

Very popular compound in the vintage community.

Are you on the R4 or the R4S on the track?

R4S is still our best seller for street duty on the F87 M2C platform.

[M2M3M3]

Originally Posted by HP Autosport

Are you on the R4 or the R4S on the track?

R4S is still our best seller for street duty on the F87 M2C platform.

R4S for street. R4 for track initially, then went to PFC11 when I bumped up the brake system.

[HP Autosport]

Originally Posted by M2M3M3

R4S for street. R4 for track initially, then went to PFC11 when I bumped up the brake system.

R4 is an excellent pad for track duty. Some of our customers wouldn't run anything else but the R4.

[M2M3M3]

Originally Posted by HP Autosport

R4 is an excellent pad for track duty. Some of our customers wouldn't run anything else but the R4.

Depending on the definition of track duty...
Works great for up to intermediate level HPDE or for endurance racing in my experience. And the folks at Porterfield are awesome! Beyond that, there are much better pad options. Looks like you are a PFC dealer...

( JMHO, i have used a lot of brake pads over 25years of racing various BMW's. There is subjectivity in pad compound evaluation. )