Trident Marine 6" ID Blue Silicone Molded Wet Exhaust Hump w/4 T-Bolt Clamp [270V6000-S/S] Brand_Flitz Then this is the option

Then this is the option

The Evolution EV-150 system also employs Raymarine's patented Hydro-Balance™ technology which delivers superior autopilot performance for hydraulically steered boats

Factory P/N GP9647

Housing Material: Die-cast Aluminum Housing

Trident Marine 6" ID Blue Silicone Molded Wet Exhaust Hump w/4 T-Bolt Clamp [270V6000-S/S] Brand_Flitz Then this is the option6" ID Blue Silicone Molded Wet Exhaust Hump with 4 T Bolt Clamp This silicone and rubber hump hose provides the ultimate flexible connector for marine wet exhaust systems. The hump hose offers much greater tolerance to heat, misalignment, engine movement, and vibration, with significant savings in cost, parts, labor, and space. Construction: Tube & Cover: VHT blue silicone Color: Blue Reinforcement: EPDM Silicone Rubber Temperature Range: 350F (177C)