DSX Tuning is the project started by Dave Steck to push forward the world of GM tuning and performance using unique solutions to problems. Dave began tuning in 2007, and quickly pushed the boundaries of what was possible with factory GM computers. Dave has a B.S. in mechanical engineering, and originally worked as a powertrain engineer for Chrysler before pursuing a personal interest in the automotive field. He has applied his engineering and problem solving skills to address the things that sometimes people don't even realize they have to fix. Pursuing flex fuel conversions on GM computers was a big project that started on a dining room table poking various ECMs with signals, and it turned into a successful product line across numerous platforms that people all over the world use.
Always looking for a challenge to provide a solution
Dave Steck
Owner
Dave Steck is the owner and founder of DSX Tuning, a company that began as a passion project and has since grown into a recognized industry leader in the GM performance aftermarket. With a degree in Mechanical Engineering, Dave leverages his educational foundation and problem-solving expertise to develop products and solutions that consistently exceed industry standards.
At DSX Tuning, Dave is responsible for new product development, reverse engineering, and project management across a wide spectrum of performance components. His work is characterized by a meticulous attention to detail and a refusal to cut corners, ensuring that every product meets the highest standards of quality, functionality, and reliability. Despite overseeing high-level projects, Dave remains actively engaged with both customers and vendors, fostering relationships that keep him closely connected to the real-world needs of the aftermarket community.
Guided by the motto “Merit, not marketing,” Dave has built his reputation on technical excellence rather than promotional flash. His skillset extends well beyond traditional mechanical design and tuning, encompassing advanced capabilities such as powder coating, laser welding, CNC programming, and even factory ECM code modification. This breadth of expertise allows him to manage the entire development process — from concept inception through final production — with a deep respect for physics, engineering principles, and seamless integration.
Dave can be reached directly at dave@dsxtuning.com or by phone at (314) 396-7333.
Matt Koenig
Director of Parts & Service
Matt Koenig is a seasoned automotive professional with more than 18 years of experience spanning nearly every aspect of the industry. His career has taken him from the service bay as a technician, to customer-facing roles as a service advisor, to leadership positions including store manager, service manager, and fixed operations director. This broad foundation has equipped him with a unique perspective on both the technical and operational sides of automotive service and performance.
At DSX Tuning, Matt plays a central role in managing day-to-day operations. He oversees the dealer network, customer support, sales, purchasing and product acquisition, inventory control, logistics, and vehicle service. His comprehensive involvement ensures that every aspect of the business reflects DSX Tuning’s dedication to quality and reliability.
What sets Matt apart is his guiding philosophy: to establish DSX Tuning as an industry pillar based not on flashy advertising or social media trends, but on genuine merit, achievement, and trusted support. He is deeply committed to serving both customers and vendors with integrity, ensuring that each interaction contributes to the company’s reputation for excellence.
For inquiries of any kind, Matt can be reached directly via email at matt@dsxtuning.com or by phone at (314) 396-7333.
Mike Ramer
Manufacturing
Mike Ramer serves as Manufacturing Engineer at DSX Tuning, where he is responsible for taking product concepts and turning them into reality through efficient, precise manufacturing processes. With a degree in Electrical Engineering and more than ten years of CNC machining experience, Mike brings both technical knowledge and hands-on expertise to the team. His career has also included roles as a process engineer and mechanical design engineer, with a strong focus on the automotive industry.
Two of Mike’s most significant accomplishments at DSX Tuning include helping to expand the company’s CNC operations to their current scale and leading the development of the Lamborghini intake manifold — a project that not only posed a steep learning curve but also helped to refine and streamline DSX’s machining practices moving forward.
Driven by curiosity and continuous learning, Mike actively explores new processes such as powder coating, carbon fiber fabrication, and injection molding, always with the goal of bringing more capabilities in-house. Outside of his core work, he has a passion for projects — whether it’s working on his cars, designing side-by-side parts, creating custom 3D-printed solutions, or building a fast electric go-kart.
While Mike prefers not to be the direct point of contact, he can be reached by email if necessary, mike@dsxtuning.com.