"Johnson Customs went above and beyond to tune my vehicle, delivering exceptional performance that exceeded my expectations."

"Thanks to Johnson Customs, my car runs smoother and more efficiently than ever before. Their expertise in automotive tuning is unmatched."

Repeat customer. 6 star. Did custom tune on my 3.0 duramax. Definitely worth it :) Came back for axle ratio change. 3.23 to 3.73 . Will be back as soon as I get the 43 gallon titan tank installed to update so my guages read accurately. Highly recommend in sioux falls , sioux city areas and beyond.

My engine light came on late Saturday afternoon and I needed to make a 12 hour journey the next day. Johnson Customs worked on my car late into the night to get me on the road and got my pcm reprogrammed perfectly. This is an amazing company who goes the distance for the customer and does excellent work. Thank you Johnson Customs, you are so greatly appreciated!!!!

You get all help what you need for tune your car or permanently remove dtc, urn off autostart. Congtatulation for the grat business what you manage.

Worked with me to clone my Body Control Module for a good price and then helped me troubleshoot further issues- all while I was in another state. Ended up needing some programming done to my ECM and that got me a back up and running. I appreciate it!!

I have nothing but praise and respect for this company. They have great customer service and they are always there when you need them. I ordered the 5.4 3V phaser lockout. My truck is now a beast. Great HP on the top end and low end. My truck started up on the first start and sounded great without any noises. I have to get used to the HP because it is very powerful. They did a amazing job with the tune that they are using. I highly recommend anyone who is second-guessing. Money well spent!! Thanks sincerely.

I have done many f150 lockout tunes with them always comes out great

Can't say enough about Johnson Customs--reflashed the ECU from my 5.4 3V Ford after locking the worn out phasers. Truck has never run better and no check engine lights--thanks Drew.

They were able to fix my Dodge charger 2022 security problem. These guys can do incredible and crazy things. Highly recommend them.

Drew is a very easy going knowledgeable guy, he works with your schedule and can do tuning while you wait, if for some reason something doesn't work right he will work with you to make it right, highly recommend him.

This has been the 3rd custom computer job Drew has done for me and every time it works like a champ. I definitely recommend his company.

Great service with two vehicles I brought to him. Expert at the HPtune for my GMC Sierra including d.o.d. delete to save me from another transmission replacement

Great service. He gave me a discount when he didn't have to. This guy is fast and efficient. I'd suggest him to anyone!

Very flexible on-the-clock also very helpful after the matter nice to have somebody like that in our city where every other website depended on sourcing business again two thumbs up

My 2010 F150 engine 5.4 now no noise 😊

it works like a champ. I definitely recommend

👌✅ 💯

Drew is the man! Did a security delete and got our work truck up and running in no time at all! Thanks man saved me a lot of time!

Great products, Outstanding customer service