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Stealth STR Turbo Line

Price, Power, and Reliability.

Turbo Upgrade Benefits

Avoid dead pedal while towing light and heavy payload. Reduce heat, exhaust braking, and optimize fuel consumption while towing.

 

Built Transmission Benefits

Our Allison Built Transmissions for Duramax trucks offer more power delivered more reliably. Here's how!

Emissions Intact vs 50 State Tuning

Learn about our 'no delete' tunes leaving your emissions system intact, and how to tune your truck and be compliant with regulations in your state.

Box Tuners vs Custom Tuning

Cheap box tuners are no comparison to our custom tuning when it comes to shifting and smoke reduction. There's a difference!

 

MPGs and Tuning

Get more from your truck's engine with our custom tuning while optimizing fuel economy.

Injector - Upgrading vs Replacing

Find out the right injector power level for your driving needs, current and future engine modification plan.

Drivability Defined

Our tuning improves 'drive-ability'. Explore what improved drive-ability means to you.

 

Reliability Defined

Find out how our custom tuning improves your truck's reliability under different driving conditions, and why it's important.

Daily Driving - More Fun

Aside from all the measurable benefits of our tuning, it's just a lot more fun to drive your truck compared to factory settings!

Transmission Tuning Benefits

Improve the smoothness of your shifting and the life of your transmission with our custom tuning.

 
 
On 12/18/23, Calibrated Power Solutions ("Calibrated") entered into a settlement with the United States Environmental Protection Agency (EPA) to resolve alleged violations of Section 203(a)(3)(A) and 203(a)(3)(B) of the Clean Air Act, related to the removal and/or rendering inoperative of emission control devices and elements of design and the manufacturing selling, offering to sell, and/or installing defeat devices for use on heavy-duty diesel engines. 

By signing a consent agreement with EPA, Calibrated has certified that it will comply with Section 203(a)(3) of the CAA, which makes it unlawful for: "(A) any person to remove or render inoperative any device or element of design installed on or in a motor vehicle or motor vehicle engine in compliance with regulations under [Title II of the CAA] prior to its sale and delivery to the ultimate purchasers, or for any person knowingly to remove or render inoperative any such device or element of design after such sale and delivery to the ultimate purchaser; or (B) for any person to manufacture or sell, or offer to sell, or install, any part or component intended for use with, or as part of, any motor vehicle or motor vehicle engine, where a principal effect of the part or component is to bypass, defeat, or render inoperative any device or element of design installed on or in a motor vehicle engine in compliance with regulations under [Title II of the CAA], and where the person knows or should know that such part or component is being offered for sale or installed for such use or put to such use."
Calibrated will pay a penalty of $125,302 and comply with the consent agreement to ensure ongoing compliance with the Clean Air Act.

If you have any questions regarding this announcement, please ask for Nick Priegnitz.

Thank you, Nick Priegnitz