Stinger GT & G70 tune. Nashville.
The Stinger GT and Genesis G70 3.3T run the same Lambda II twin-turbo V6, so we tune them the exact same way - and few platforms respond harder to a flash. Stage 1 on 93 octane typically picks up 60-80 whp, same-day, for $599. We flash the factory ECU directly rather than wiring in a piggyback, and we prove our work on our in-house dyno.
Every Carma tune includes.
Real prices, no dyno-number runaround. Here's what comes with every flash — at no extra charge.
What we do for the 3.3T twins.
Stage 1 is a full recalibration of the factory ECU - boost targets, ignition timing, fueling, throttle response, and the torque-management strategy Kia bakes in to keep the driveline feeling gentle. On 93 octane the 3.3T typically picks up 60-80 whp, one of the strongest returns of any platform we flash, because the factory left that much on the table. It's a same-day appointment: drop the car off, we flash it, you drive home on it. Return to stock is free anytime, and when you add parts later, the re-flash is free too.
There's a big piggyback scene on this platform - JB4 boxes that intercept sensor signals to trick the stock calibration into more boost. They work, but we'd rather rewrite the actual tables so the ECU knows exactly what it's doing instead of correcting around an offset. And unlike late-model Dodge, BMW, and GM, there's no locked-ECU surcharge here - the Stinger and G70 flash straight through the port. When you're ready for more, downpipes and intercooler upgrades are the classic Stage 2 pairing, and an E85 blend map opens the door to numbers that chase a MK5 Supra for a fraction of the buy-in. We do the same work on Nashville's other twin-turbo six sport sedans - see the Infiniti Q50 and Q60 VR30 if you're cross-shopping the segment.
- Direct ECU flash - no piggyback boxes
- Typical 60-80 whp on 93 octane
- Same-day Stage 1 - in and out
- 8-speed auto cal available
- Free re-flash as you add parts
- Free return to stock, 48h refundable booking
Pricing for the kia stinger gt & genesis g70.
Mods we pair with this tune.
Stage 1 covers a stock or lightly modified car, and the re-flash is free every time you add parts. Here's what the 3.3T actually responds to:
- Downpipes — The first bolt-on that matters on this engine - both turbos breathe easier and we re-scale boost to use it.
- Intercooler upgrade — The stock coolers heat-soak fast in a Tennessee summer; bigger cores keep timing in the map on back-to-back pulls.
- Intakes — Small gains on their own, but they support airflow once boost targets come up at Stage 2.
- E85 blend fueling — No factory flex sensor, so we map a fixed blend - more octane, cooler charge temps, serious power.
- Oil catch can — The 3.3T is direct-injected, so intake valves collect carbon over time; a catch can slows that down on a tuned car.
No dyno-number games, no hard sell. Drive it, and if the tune isn't for you, we revert to stock at no charge. That's how confident we are in the map.
Common questions.
Is the tune identical for the Stinger GT and the Genesis G70 3.3T?
Yes - same Lambda II twin-turbo V6, same ECU family, same calibration work, same $599. Genesis badges it differently, but under the hood it's the identical engine, so gains and turnaround are the same for both cars.
Why flash instead of a JB4 piggyback?
A piggyback intercepts sensor signals to trick the stock calibration into more boost, and the ECU spends its life correcting around it. A flash rewrites the actual boost, fueling, and timing tables so everything the ECU sees is real. We only do flashes - it's the honest way to tune this platform.
Do you touch the 8-speed automatic?
We can. The factory trans cal is tuned for smoothness, so it torque-cuts on shifts and gives up power the engine tune just earned back. An 8-speed cal firms things up and lets the gearbox keep pace with the new output - mention it when you book and we'll scope it in.
My Stinger is AWD - can you still dyno it?
Our chassis dyno is 2WD only, so RWD cars get strapped down and AWD cars get dialed in off street logs instead. The calibration quality is identical either way - the data is the tune, the dyno is the proof. RWD owners can add a $349 dyno session for before-and-after numbers.
Can the 3.3T run E85?
Not straight E85 - there's no factory flex-fuel sensor - but blend maps are where this engine really wakes up. We map a fixed mix you can repeat at the pump, and the added octane plus cooler charge temps let us run timing the factory never could. It's the best dollar-per-horsepower move after downpipes.
What does Stage 2 look like on this platform?
Downpipes plus intercooler upgrades - heat is the 3.3T's main enemy, and that combo attacks it from both ends. Stage 2 is priced by call because we scope it to your exact parts list rather than selling a one-size-fits-all file.
I already have a JB4 on the car - what happens to it?
We take the piggyback out of the equation entirely, return the car to a clean baseline, then flash the ECU properly. Most owners sell the box afterward and cover a chunk of the tune. If the car's been running hard on it, we'll log everything first to confirm the engine underneath is healthy.
Book your Kia Stinger GT & Genesis G70 tune.
Drop it off in the morning, drive it home tuned by end of day. 1035 3rd Ave S, Nashville, TN 37210 · Mon–Fri 8 to 5.