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VEHICLE ECU TUNING

XCEL Tuning 

  • E-Tuning via XCEL RTD flash device with smartphone connectivity - datalog and flash maps
  • Travel Tuning
  • Standalone Engine Management System Installation and Calibration (tune) 
  • XCEL/XceL Clothing
  • Performance Packages
  • Built Motors
  • Comp Turbos
  • Crate Motors for Shipping 
  • JDM Swaps
  • More Involved Performance Engineering Services

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High Performance;

  • Reliable
  • Powerful
  • Consistent

   ---ETUNING ---

 XCEL RTD flashing device for most domestic and euro vehicle tuning.  Flash our off the shelf and custom maps to your vehicle with your iOS or Android smart phone.  SIMPLE!

XCEL/ExceL Rags

About XCEL Tuning

E-Tuning and Clothing. 

Our Business Partners

Company Info.

South Side Autotune LLC. specializes in tuning, performance parts, and performance engineering services.  



Why South Side Autotune

  • Keep the customers best interest in mind 
  • Provide the highest level of services
  • Honest in all aspects
  • Years of experience and proven results
  • Fully Insured

Customer Testimonials

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Get in Touch

Thank you for your interest in our company. If you have any questions, simply fill out the inquiry form on this page. While you’re at it, make sure to request a free estimate and initial consultation. Don’t forget to follow us on Facebook, Instagram, and TikTok @southsideautotune

Contact Information

South Side Autotune LLC.

802 W Southern Ave South

Williamsport, Pennsylvania 17702

Phone: 272-215-2121

Email: [email protected]

Service Areas

We serve customers worldwide.

Operating Hours

Monday to Friday: 9:00 AM – 5:00 PM

Inquiry Form

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