Unfortunately, a car muffler would significantly change the back-pressure and will adversely affect the engine.
Our engines are engineered and tested with Briggs & Stratton parts. Any non-authorized modifications made to the engine can and will change the performance and ultimately shorten the lifespan of the engine.
NOTE: Please read and abide by any applicable Safety Information (PDF) before performing any engine work. This information is not meant to take the place of work performed by a Briggs & Stratton Authorized Dealer. Terms and Conditions apply to all of our information provided on this website. Always be sure to read and understand your engine Operator's Manual.