Porterfield Carbon Kevlar R4-S Performance Street Brake Pad:  AP 947 R4-S (FRONT PADS)

Porterfield R4-S Carbon Kevlar High Performance Street Brake pads. With a coefficient of friction up to 0.41 you will experience great stopping Performance without the dust and noise of other pads on the market. Low Dust, Quiet, Easy on Rotors and great Performance are the features that make this our best selling Performance street pad.

Typical AP 947 R4-S applications are BMW E46 M3 Competition Package and Z4 M front brakes.

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