M4 Exhausts has been a fixture in the AMA Pro Racing paddock for years. M4 specializes in bike exhaust parts for Suzuki-brand bikes and also makes exhausts for a variety of other models you can see below. Much of M4's research and development comes from their success on the race track. M4 is the chief sponsor on the M4 Racing Team which fields Martin Cardenas and Dane Westby as riders in both Daytona Sportbike and AMA Superbike. Martin won the Daytona Sportbike Championship in 2010, while Dane won his first DSB race this past 2011 season. Both riders will be competing in Daytona Sportbike in 2012 and are exclusively use M4 exhausts. M4's focus is always on high quality, performance exhausts. They have built a solid name over the years for their quality and customer service - and the result is a great lineup of exhausts. M4 not only makes racing exhausts, but street performance exhausts as well with their GP and Street Slayer exhaust systems.
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