Muffler Men (or Muffler Man) are large moulded fiberglass sculptures that are placed as advertising icons, roadside attractions or for decorative purposes, predominantly in the United States. Standing approximately 18–25 feet tall, the first figure was a Paul Bunyan character designed to hold an axe. Derivatives of that figure were widely used to hold full-sized car mufflers, tires, or other items promoting various roadside businesses.
International Fiberglass of Venice, California constructed most Muffler Men. While the fiberglass figures are no longer manufactured, many still exist throughout the US with a few in Canada. At least four remain on U.S. Route 66, including Chicken Boy and Gemini Giant.
Muffler Men have made appearances as characters in the comic strip "Zippy the Pinhead" by Bill Griffith, often in conversation with Zippy. Two books have been devoted to the distinctive roadside figures and the July 2012 issue of AAA New Mexico Journey devoted its front cover to their 50th anniversary.
Boatbuilder Steve Dashew established International Fiberglass in 1963 by purchasing and renaming Bob Prewitt's workshop, Prewitt Fiberglass. The oversized fibreglass men, women and dinosaurs began as a sideline.
The first of the figures, a Paul Bunyan holding an oversized axe to promote a restaurant, was created by Bob Prewitt in 1962 for the Paul Bunyan Café on Route 66 in Flagstaff, Arizona.
As the fibreglass moulds for this initial figure existed when Dashew acquired the company, similar characters could be readily created by keeping the same basic characteristics (such as the right palm up, left palm down position in which the original Bunyan lumberjack figure held his axe) with minor variation. Various fibreglass moulds allowed different heads, limbs or torsos to be substituted to create multiple variant characters. Some would promote food, others automotive products. A fifteen-foot Amish man standing over a diner in Lancaster County, Pennsylvania and a Uniroyal gal in a skirt or bikini were among the many variants.