HPS 5" ID, 3 Feet Length, Silicone Straight Coupler Coolant Tube Hose, High Temp 4-ply Reinforced, Blue, 127mm ID Billet-Battery-Tie-Downs Most E90 owners source these

Most E90 owners source these locally since they're common items and easy to swap once the housing is in

If your gauges are standard 2-inch round instruments

Fits: 2017–2020 Audi A3 with Base / Premium Bumper

Can I test this radiator before final installation

No more pressure points

HPS 5" ID, 3 Feet Length, Silicone Straight Coupler Coolant Tube Hose, High Temp 4-ply Reinforced, Blue, 127mm ID Billet-Battery-Tie-Downs Most E90 owners source theseHPS 5" (127mm) x 3 Feet Long High Temp 4 ply Reinforced Blue 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 engineerd to meet high performance requirements specified in various industry standards, therefore make it great for marine and industrial use, custom