At EMS, we’re car people first—builders, tuners, and racers who take pride in doing things the right way. Our core strengths are built engines and custom tuning, and we’ve built a reputation around pushing the EcoBoost platform far beyond what most think is possible. We specialize in the Mustang EcoBoost, Focus RS, Focus ST, Fiesta ST, and Explorer ST—because these are the cars we’ve spent years perfecting on the street, at the track, and on the dyno.

EMS was founded by, Jessie Ringley, and his wife Susan, along with Tuner Ryan Martin, who all share a passion for performance and a commitment to excellence. If you’ve heard of us, there’s a good chance it’s because of the world’s fastest EcoBoost-powered car—built and tuned in-house right here in Rogersville, Tennessee. That same attention to detail and performance goes into every customer build. Whether it’s Ryan (Tuned by Ryan) or Westley (Tuned by Westley) handling your calibration, you’re working directly with people who are passionate about getting your setup right.

We’re not here to just move parts—we’re here to build relationships and solve problems. Everything we sell or install is something we’ve tested ourselves, and every tune is crafted to bring out the best in your specific setup. When you work with EMS, you’re backed by a team that’s in it with you—from your first build to your next personal best.

Contact us today and let’s make your car faster, more reliable, and uniquely yours.