For more than three decades, Custom Marine fabrications and exhaust systems have been skillfully-built to exact standards. This has made us the number one choice for Military applications as well as offshore racers and performance-oriented boaters who demand superior on-water performance. CMI offers metal fabrications, both tubular and sheet plate manufacturing as well as performance stainless steel water jacketed exhaust headers, diesel exhaust risers. Common materials used are stainless steel, titanium, aluminum, and duplex alloys. At CMI, we work with the most respected OEM boat builders and marine engine manufacturers in the world who place their trust in CMI to ensure their products deliver the performance and quality their customers demand. Our industry-leading technologies from concept to production are race-proven and have earned us a place in the winner’s 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.