HPS Performance Products HPS 4-1/8" (105mm) Silicone Straight Coupler Hose, High Temperature 4-ply Reinforced Length:4" Can I order just one

Can I order just one cover or do I have to buy two

or do I source bolts myself

Pipe Gasket

LT Trail Boss 2023 Chevrolet Silverado 1500 PPV 2019 - 2021 Chevrolet Silverado 1500 SSV 2019 - 2020 Chevrolet Silverado 1500 WT Cab Regular 2022 - 2023 Chevrolet Silverado 1500 ZR2 2019 - 2023 GMC Sierra 1500 AT4

Do I need to flush the AC system before installing this

HPS Performance Products HPS 4-1/8" (105mm) Silicone Straight Coupler Hose, High Temperature 4-ply Reinforced Length:4" Can I order just oneHPS 4 1 8" (105mm) high temperature 4 ply Reinforced Silicone Tube Coupler Hose meet and exceed SAEJ20 industry standards, ideal for heavy duty pressure connections and provides excellent resistance for high temperature applications. HPS performance silicone Tube Coupler Hose is designed and engineered to meet high performance requirements specified in various industry standards, therefore make it great for automotive, diesel trucking, industrial,