850-530-2912
850-530-2912

Let us put our signature touch on your next build

Located in Milton FL

Signature speed and repair proudly serves the panhandle and surrounding areas. Providing expert installation of GM performance parts, custom ECU calibrations, and advanced wiring diagnostics. From general repair to full scale performance builds, we deliver the results your vehicle deserves.

Let's Get Started
Performance Builds • Custom Tuning • Diagnostics •

Purpose Built Performance

Every great project starts with a solid foundation we specialize in expert installation of GM performance parts and full scale performance builds tailored to your specific goals.

Precise Calibration

The Signature Standard : We don’t just “flash” cars; we optimize each combination providing custom calibrations that maximize performance and drivability.

Beyond the Build

Our partnership continues long after the initial project is complete. From routine maintenance and general service to planning your next performance upgrade, we provide the technical expertise and data driven support needed to keep your vehicle reliable and evolving.

Signature Client Reviews

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Outstanding Service and Expert Performance Work. I have had several vehicles serviced, from tune-ups to full blown race car builds, with Shayne at Signature Speed & Repair. I couldn’t be more impressed with the quality of Shayne’s work and professionalism. From start to finish, he was very knowledgeable, transparent, and genuinely committed to doing the job right the first time. He took the time to thoroughly diagnose the issue, explained every step of the repair process, and delivered everything on time. The performance upgrades he recommended made my car a monster with noticeable horsepower improvement.

5
Durdy M.
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Came in lost on how to add more power efficiently to my 2018, Shayne is just the guy for the job, was very responsive when I reached out, helped me source parts, took time to understand what it is I wanted out of my vehicle and made it happen!! Would recommend him for anything LS / LT related 10/10

5
Bernardo M.
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I drove all the way from Foley to Milton just to have Shayne work on my vehicle. Shayne went above and beyond when doing the cam install on my 2015 Camaro SS 1LE. He gave me a timeline of when it would be completed and once completed ensured it was tuned correctly and performed as should. He even sent me pictures of the progress and any additional pictures I requested. He answered all my questions as a first timer with a cammed vehicle promptly. Even after the service he had me bring it back to check everything over once again to ensure it was up to his expectations. If you need any engine modifications big or small, Signature Speed & Repair is the place to go.

5
Chris J.
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10/10!!! I won’t take any of my vehicles anywhere else! A custom tune turned my Caprice PPV into a monster!

5
Jacob N.
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Shayne tuned my fresh build and ironed out cold starting issues. He also was able to diagnose some issues with sensors I was having.

Shayne is knowledgeable, persistent, and customer oriented.

Use him with confidence.

5
Tim R.
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Signature Speed and Repair installed an auxiliary fuel pump on my 6th Gen Camaro and WOW! Shayne’s attention to detail is unmatched! Very clean install, all wires and fuel lines routed as if it came from the factory… actually better! Amazing work and highly recommended! Thank you!

5
Alan N.
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100% recommend seeing Shayne for tuning, automotive work, custom accessories, and aftermarket performance modifications, he can do it all. Down to earth guy and knowledgeable in all aspects.

5
Kyle N.

The Signature Standard

We provide a comprehensive approach to vehicle performance and maintenance. Specializing in the GM performance ecosystem, we deliver precision calibrations utilizing the latest HP Tuners and Holley EFI platforms. Our process begins with hand selecting premium components from industry leading manufacturers and extends to expert EFI conversions and custom wiring solutions. We are a full-service facility dedicated to the total health of your vehicle. From engineering high-horsepower builds to performing routine general repairs and essential maintenance for your daily driver, we apply the same level of technical precision to every task. Whether you are chasing a new personal best at the track or simply need reliable service for your vehicle, We provide the professional follow through and support needed to keep you on the road.

Get in Touch

FAQs

What do I need to do before my tuning appointment?

Your vehicle must be mechanically sound. Please ensure:

  • Fresh spark plugs (correctly gapped).
  • A full tank of the fuel you plan to run .
  • No active oil, coolant, or exhaust leaks.
  • A healthy battery (crucial for flashing the computer).
Can you "tune out" a mechanical problem?

No. Tuning is the final step to optimize a healthy engine. If your truck has a vacuum leak or a bad sensor, a tune will not fix it; it may even make the symptoms more obvious.

Will a tune void my factory warranty?
While many dealerships are performance-friendly, any aftermarket modification can potentially affect your powertrain warranty. We recommend discussing this with your specific service advisor, though we can always return your vehicle to the stock calibration if needed.
What vehicles and software do you support?

To provide the highest level of precision and safety, we focus exclusively on Chevrolet/GM factory ECUs using HP Tuners and Holley EFI standalone systems.

Supported Systems: All Gen III, IV, and V GM platforms (LS and LT engines) and all Holley EFI platforms (Terminator X, HP, Dominator and Sniper).

What we DO NOT tune:
We do not tune handheld “canned” tuners (Diablo, SCT, etc.), diesel platforms, or non-GM factory ecu’s. By staying dedicated to the GM ecosystem, we ensure your vehicle gets a superior level of calibration that general shops simply can’t match.

What kind of support do you offer after my tune is finished?

Our Support Policy:
The 30-Day “Driveability” Window: If you notice any hiccups in cold starts, idle quality, or shifting within the first 30 days, bring it back or send us a data log. We will adjust the software at no cost to ensure it’s perfect.

Diagnostic Assistance: If a “Check Engine” light or performance issue arises post-tune, we will help you pull codes and review data logs to determine if it is a Tuning Issue (Software) or a Mechanical Issue (Hardware).

If it is a calibration: We fix it for free.

If it’s mechanical (failed plug wires or fuel pressure drop): We will provide a diagnostic report so you know exactly what needs to be fixed. Standard shop labor rates apply if you’d like us to perform the mechanical repair.