Porterfield Brake Pads for 2014 AUDI A7/A7 Quattro TDi Compound:R4-1 but line diameter is not

but line diameter is not specified in the product data

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It's hidden behind your bumper

you'll need to verify that your vehicle's electrical system supports the heating circuit

Halo DRL integrated design

Porterfield Brake Pads for 2014 AUDI A7/A7 Quattro TDi Compound:R4-1 but line diameter is notPorterfield Brake Pads for 2014 AUDI A7 A7 Quattro TDi Porterfield R4 Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon Kevlar material also allows the