exhaust diffuser not noise muffler not worth the asking priceshipping two stars looks good but may not muffle as much as youd like good diffuser i took it back great addition to a great shop vac changes airflow not decibels nice to find a product that actually works sort of a wasted 5 buy the universal filter 2pack from gentap inline filter for small engines exact fit fit my vanguard briggs engine on my riding mower correctly good replacement filter applications limited to systems with fuel pump this filter cured the fuel starvation issues on my kohler perfect fit