I've been very pleased with the Lap3 I had on my Optima SX for couple years. Most in Optima had it as well as not a lot of options I recall. Nice to now I can just move it over to the Stinger. They are they most familiar with Korean cars. With the Stinger coming out I think there will be a lot of new tuners going after this market now, piggy-back or tune. Not saying they are bad but Lap3 will most likely have most knowledge(I feel) and why I choose them. From there About Us homepage LapUSA.com:
"LAP3 was originally founded in 2002 as PROSS, the tuning division of SPIRRA, specializing in absolute power components and ECU program mapping.
Since its inception LAP3 has been a leader in the Korean tuning market through the pursuit of excellence and innovation in their quest to be number one.
Our goal is to bring authentic tuning solutions and products for the U.S. market that will unlock the true potential of your vehicle."