Choose CMI...You'll Be In Good Company! At CMI, we work with the most respected marine engine manufacturers, OEM boat builders and distributors in the world who place their trust in CMI to ensure their products deliver the performance their customers demand. Our industry-leading technologies and race-proven products have earned us a place in the winners circle on race circuits worldwide. But it’s our reputation for delivering high-quality performance products that has earned long-term relationships with the customers we serve. For more than two decades, Custom Marine stainless steel exhaust systems have been skillfully-built to exacting standards, which have made them the number one choice for offshore racers and performance-oriented boaters who demand superior on-water performance. CMI offers, Big Tube Headers, Big Elbow Top Headers, Sport Tube Headers, Gen-X Headers, Tailpipes, Mufflers, Transom Tips, Sea Strainers, Trim Rings and more.
Boat Building Supplies
Propulsion / Power