This mod dramatically quiets the generator exhaust noise.
The exhaust extension is a pressure fit, however there is a stainless steel clamp holding the entire assembly in place to the swim platform support so it doesn't move.
The rubber piece is available at your local Home Depot/Lowes and is a wet vac adaptor for going from a large hose to smaller hose. RIDGID Universal Power Tool Adaptor Model VT1407
(Available at http://www.ridgidparts.com/accessories/VT1407.phtml
Cut at the first step to the right from the square part. Use a dremmel type tool to reduce or taper the edge to help it fit in and the press in. The largest diameter fits perfectly around a 2" PVC fitting.
Total cost about $20
Cuts the noise which is amplified by the large swim platform WAY down!