VEHICLE ECU TUNING
XCEL 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
High Performance;
High Performance;
- Reliable
- Powerful
- Consistent
About XCEL Tuning
About XCEL Tuning
E-Tuning and Clothing.
Our Business Partners
Our Business Partners
Company Info.
Company Info.
South Side Autotune LLC. specializes in tuning, performance parts, and performance engineering services.
Why South Side Autotune
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
Customer Testimonials
“Greg tuned my car remotely and I was surprised how few revisions it took to get it going. I have a downpipe a high flow fuel pump, 1000cc ID injectors, Intake, and a whole bunch of other stuff. The car is a beast, I was running Cobb Stage 3 OTS map and the difference is huge! The power curve is so smooth, the car got so much power and torque that I don’t know what to do with. Very professional and knows his stuff. No knock whatsoever and I only get 91 octane fuel in CA, he still managed to get out every horse safely.”
- Yousef Hamed, Los Angeles CA
- Yousef Hamed, Los Angeles CA
Recently I took my car to get a turbo kit. Greg, the owner, did an amazing job on my car! He recommended parts for my car that I would need to do the job and is super knowledgeable at what he's doing. He worked on the car for awhile and kept me in contact on what he was doing, and what progress he made on the car daily. He would contact me if the car needed anything and photos to show the cars progress as well. Super responsive to messages. He knows a ton about Subaru's and does great work on them, but he does great work on many makes and models of cars so don't be shy to ask any questions about a car. Thank you for the work you've done and for the future work for the car!
- Clayton Shaffer, Lewisburg PA
- Clayton Shaffer, Lewisburg PA
Greg put a jdm 2.0 in my 07 wrx along with 1000cc injectors an intercooler and numerous other small odds and ends pieces to help with future plans for the car. The one thing I can say about him is he keeps his word and very obviously knows his way around a Subaru my tune is on point for my driving style and makes the car that much more fun to daily. Thanks a lot Greg I love my car already I’ll be seeing you soon for the next step of my build
- Zach Stiller, Williamsport PA
- Zach Stiller, Williamsport PA
“Awesome service. Quick responses and great feedback on logs, got the car running so much better than stock. Hard to find someone who will actually teach you along the way. 5 stars here. Update : bought their intake, installed and tuned! looks really good feels good and was packaged like a tank lol. running great and getting revisions done.”
- Ravie Goordial, Diesel Mechanic, Toronto
- Ravie Goordial, Diesel Mechanic, Toronto
Took my 2015 wrx in for turbo upgrade, some quick diagnostic work, and a tune touch up from the previous one done here to accommodate for the bigger turbo. All the work was done in a timely manner, great customer service, very accommodating seeing as I usually have a tight schedule due to work. Since then the car has been running great and I still stay in contact with the shop if I have any questions. Would definitely recommend.
-AJ Doebler, Williamsport PA
-AJ Doebler, Williamsport PA
“Highly recommend Greg after the road tune yesterday. After buying my 09 WRX in February, I found out it was swapped with a jdm EJ20 motor. The original tune had the car stumbling at high RPMs and caused issues with the boost. Greg took the time to adjust all the parameters within the tune time and time again, until it was running great. He has my car running faster and smoother than before with just a CAI install and tune update. He also took the time to make sure the Bro Tunes intake was mounted perfectly. Greg’s tune has my car feeling great. I can’t wait to go back after I install my new parts.”
- Ryan Martin, Pennsylvania
- Ryan Martin, Pennsylvania
“Fast statewide shipping, very helpful in setting up my computer to tune my vehicle. waiting for my tune so far 5 stars if you want a cable. He can get it there fast.”
- David Atkinson, Oregon
- David Atkinson, Oregon
Feedback Form
Feedback Form
Get in Touch
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
Contact Information
South Side Autotune LLC.
802 W Southern Ave South
Williamsport, Pennsylvania 17702
Phone: 272-215-2121
Email: [email protected]
Service Areas
Service Areas
We serve customers worldwide.
Operating Hours
Operating Hours
Monday to Friday: 9:00 AM – 5:00 PM
Inquiry Form
Inquiry Form