JD 006

Porterfield R4 Road Racing Disc Brake Pads for 4 Piston Kelsey Hayes Calipers (1965-1966) Mustang

$135.95

Product Description

Set of 4 front brake pads for any early Ford with the four piston Kelsey Hayes front disc brake calipers.
FORD:

65-66 Mustang w/Front Discs

67 Mustang w/Front Discs exc. 428 V8

67 Mustang 428 V8 w/Front Discs

MERCURY:

67 Cougar 289 V8 w/Front Discs/390 V8 w/Front Discs

For over two decades, the Porterfield Carbon Kevlar brake pad has given racers abroad a definite world class friction material suitable for virtually any racing condition. Designed specifically for heavy duty motorsports, the Porterfield R-4 brake pad was our first and is our original Carbon Kevlar brake pad. Being able to maintain an average of a .50 friction level within a very wide temperature range gives the R-4 pad astounding versatility and makes it very suitable for a wide array of various track conditions. With use of the latest ceramic technology, the Carbon based semimetallic R-4 materials allow the pads to absorb tremendous amounts of heat and dissipate it at a very even rate, while at the same time insulating excessive heat from calipers. Another inherent characteristic of our Carbon Kevlar material is how quickly the pads warm up to race temperature which is quite helpful during restarts, and when track time is limited. Optimum R-4 operating temperatures are 450ºF and above. When used with cast iron and steel alloy rotors, the R-4 compound requires minimal bed-in period. Throughout the entire heat range, the Carbon Kevlar material will give extremely consistent modulation and predictability smooth release characteristics up to threshold. Another benefit of our R-4 compound is that even with the high friction levels and broad temperature ranges, the unique properties of our compound allows the rotors life to be extended to the maximum. This is truly the most rotor friendly racing brake pad material ever. Road courses, oval track, rally, vintage racing, autocross, club events or professional racing events. Tested and raced in countless types of competition vehicles, the R-4 compound from the outset has established its reputation as a Championship winning brake pad material.