RIPP - Maxflow Bypass Valve Silencer Eliminate the Whistle! The RIPP Maxflow Bypass Valve Silencer is a simple yet effective solution for reducing the high pitched whistling noise commonly caused by bypass valves venting pressure. This small adapter attaches directly to the outlet port of your Maxflow bypass valve and disrupts the airflow just enough to reduce or eliminate the irritating sound without compromising valve performance. Machined from billet aluminum and secured in place with a set screw, the silencer installs in minutes and fits seamlessly into your existing setup. It’s the perfect add on for those who want all the benefits of a high performance bypass valve without the unwanted dog whistle noise. Features: Reduces or eliminates bypass valve whistling noise RIPP logo Attaches directly to Maxflow bypass valve outlet Constructed from high-quality billet aluminum Quick and secure installation with set screw Maintains airflow and performance