Powerboat transom-mount stern tunnels mount through the rear of the transom and are offered in six diameters to fit Side-Power Thrusters. Tunnel ends are flared to lessen turbulence.
Tunnels are ready bored, with extension harness for control box.
Matching add-on cowls (not shown) are available to address transom obstructions (such as outdrives), or shallow draft. (Tunnel only; thruster not included)