Porterfield Brake Pads for 2015 SUBARU BRZ w/ Vented Rear Disc Compound:R4-E Do I need to bolt

Do I need to bolt this down or can it sit loose

009 Oversized Size Rod Bearing Set - CT-1 Coated

COMP Cams Camshafts 11-654-47 CamShaft

Diameter: 5/16"

but electrical integration depends on your truck's existing mirror wiring setup

Porterfield Brake Pads for 2015 SUBARU BRZ w/ Vented Rear Disc Compound:R4-E Do I need to boltPorterfield Brake Pads for 2015 SUBARU BRZ w Vented Rear Disc 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