Porterfield Brake Pads for 2015 GMC YUKON 2WD Denali Car Apparel or do I need a

or do I need a cat-back too

Will this mount directly to my bumper

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2x Front Bumper Lip Spacers

Porterfield Brake Pads for 2015 GMC YUKON 2WD Denali Car Apparel or do I need aPorterfield Brake Pads for 2015 GMC YUKON 2WD Denali 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