[Stock 9th Gen Si]

i did mine with etunez (steve) but some people have complained on here that they are not good anymore.Derek is pretty good as well

 

[JJreal]

You can do a Hondata yourself, Race Version. Just enter the tune close to what you have modded. Now if you're looking to race & show off, I would get a Dyno tune. When I first added a Skunk 2 cold air intake, my car ran like crap. When I purchased a Hondata (Race Version) I just tuned it right off the paper, I mean computer, nothing crazy, you don't need anything knocking. Boy, did that breathe fire into that car's performance. I will say with every mod to enhance performance, fuel mileage will decline. I had to stop with the racing high-flow fuel pump & high-flow fuel rail, I was going through Michelin tires like crazy too, but I have fun. Only one ticket from 2021, cause they can't catch me.