FAQs
Will it come with instructions?
Yes you will get complete step by step instructions for easy install.
What is included in this purchase?
You get one (1) Performance Chip From Thorton Chip Tuning and installation instructions.
Will this void my warranty?
Absolutely not. Our tuning chip will not void any warranties. If you have a very strict underwriter on your warranty you can simply unplug the unit before taking your vehicle in for service with no traces and install it later.
Will this work with aftermarket performance upgrades?
Yes, It will work with all aftermarket upgrades as well as factory upgrades.
Will I get any errors on my dash board after installing this tuning chip?
Our tuning chip will not cause any dashboard errors or warnings.
Do I need any special skills or tools?
No special skills are required. Just plug into your OBD2 port and follow simple instructions included.

Will this module fit my 4cyl, 6cyl, 8cyl?
The Thorton Performance Chip will fit all engine sizes and types for your make of vehicle. Be sure to select the correct Make, model and engine of your vehicle when purchasing.















Sure gave my Optima SX a burst of power. I dont know if I’m getting 60 extra hp, but I feel better acceleration and am getting better fuel economy on top of it. I would recommend this chip to any Kia owner wanting to improve their performance.
Got it in reasonable time and simple instructions. Plug and play it was a different car when I let the clutch out in first gear. All gears pulled strong and it got to my cruise speed in almost half the time of before. Can’t wait for the next purchase from Thornton. Thank you guys for a great performance product.
Received my delivery and got it all plugged in, and the average mpg reading on my dash already reade +2 mpg after a 50 mile drive… THANKS!!
I definitely can feel a difference, however I doubt the stage 2 gets a 40hp gain I have a axle back an bov rn, working on getting a stage 2 takeda cold air intake ,resonator and downpipe maybe we will start seeing more of a difference. A lot of kias have a slow response (Kia forte gt and Elantra n lines) when you give it full throttle this will take that slow launch feeling away:)
Wow right off the soon as I plugged in my stage 3 I felt a difference on my 2020 Optima and I have that K&N Filter and a throttlebody spacer and wow the look on other people’s face’s that are behind me they just back right off of my rear bumper love this chip and had the same one before my car was stolen from me back in October 4 and got it back in December 31 and I was so sad when i found out my old chip was missing but I soon after I had my car back I just recently bought a new one and man I forgot how these little guys felt and I’m a very happy camper!