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911 Brake Products and Accessories > Porterfield AP31 R4-S - 911 Front and Rear M-Caliper through 1983
Porterfield AP31 R4-S - 911 Front and Rear M-Caliper through 1983

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Orig. Price: $89.95
Sale Price: $79.95
Prod. Code: AP31-R4S

***Pads are sold in sets.  One set will cover one "axle" (see enclosed picture)***

For high performance and heavy duty street conditions the Porterfield R4-S compound remains our favorite and is a top performer in the realm of street/performance brake pads.

Ever though you needed a brake upgrade? This is “by far” the best place to start. 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 (and a minimum hurt on your wallet when compared to other costly so-called upgrades).
These pads are perfect for prolonged, day in and day out street driving while also being capable of enduring the most severe use without fade. It is also rotor friendly of course.
The folks at Porterfield have gone to great measures to ensure that the R4-S compound has the absolute lowest 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 (call if you need to upgrade the grocery getter). They simply have superb stopping power under heavy use.
These pads are our favorite for 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.
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If you don't see your model listed here please send us an e-mail at sales@pmbperformance.com or call (855) STOP-101 (855-786-7101).  We can usually get what you need within 1-2 business days.

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Except as indicated, these products are not approved by Porsche® AG: Use of unapproved parts may alter factory warranty, emissions, aerodynamics, or fuel consumption. PMB Performance is not associated with Porsche Cars North America in any manner. All references to the Porsche name, and the vehicle names are for reference only and do not imply any association with Porsche® AG. Always consult authorized factory manuals when performing repair procedures. "Tech Tips" and "How To" articles on this site are for reference only. By entering this site, you agree to hold PMB Performance free from any liability arising out of the use of any information contained herein.

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