SSi3 or SSi4 Performance Upgrade $100.00

SSi3 or SSi4 Performance Upgrade $100.00



This is a charge for an existing customer who would like to upgrade to a SSi4 custom tune. Maximum Safe Power!

-Designed in regards to the desired power  and performance as unique as your own driving preferences-

There is no substitute for EXPERINCE. When it comes to automotive tuning you do not want to trust your vehicle, your investment, to just anyone. Our many years of proven dyno tuning, street tuning, and track experience is your here for your benefit. There are no substitutes for the knowledge, testing, and situational experiences that comes from almost 20 years in hi performance fuel injection performance.  We have tuned everywhere in the US and worldwide. Our custom tuning supplies you with the best maximized safe programming for your vehicle whether it may be naturally aspirated or forced induction. All of our custom tunes address off throttle, part throttle, wide open throttle, and power under the whole curve. This is complete comprehensive professional tuning. As you all know most tuners address only an aspect or two but this is a reason why all of our customers are extremely satisfied with Southern Speed Inc tunes because it is a complete professional tune. Nothing overlooked or half way done here. We deliver excellence as that is the only way we know.


This is for an existing customer who would like to upgrade their SSi 1 or SSi2 custom tune to our SSi3 or SSi4 with the TrumpX tuning.

This is the smoothest, fastest, most powerful, and fuel efficient tune you can buy.  

This also requires a data log of a previous SSi1 or SSi2 tune you are currently running. Our first priority is the health and longevity of your vehicle. Data logging is not absolutely necessary in our basic tunes 95% of the time however fo our higher performance or race tunes it is an absolute requirement because we do things safely, accurately, and responsibly.




Additional information

Qty Custom Tunes

1 for $175.00, 2 for $250.00, 3 for $300.00

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