SeoulfulRacing (SFR USA)

07/03/2026

July 4th 20% OFF ECU tune sale!
Code: july4th (lowercase)

07/02-07/05/2026

12/25/2025

Just got done tuning ‘s sleigh made sure it has crackle pops and shoots flames. Dyno tuned sleigh 🛷 = faster gift delivery 🚚

12/19/2025

🎅 Santa upgraded his sleigh this year…
Turns out reindeer pull better with a proper ECU tune.

We’re running 15% OFF ECU Flash Tuning for a limited time.
More power, better throttle response, and smoother drivability — all dialed in safely.

✔ Proven power gains
✔ Better drivability
✔ Safe, reliable calibrations

🎁 Upgrade now, enjoy it all year
⏳ Holiday sale won’t last long
👉 Lock it in before the year ends.

Promo code: holiday2025 (all lower case). Dec 19-Dec 31,2025

sfrusa sfr_usa seoulfulracing ECUTuning TunedNotStock HolidaySale
BoostSeason CarCulture PerformanceUpgrade

12/19/2025

🎅 Santa upgraded his sleigh this year…
Turns out reindeer pull better with a proper ECU tune.

We’re running 15% OFF ECU Flash Tuning for a limited time.
More power, better throttle response, and smoother drivability — all dialed in safely.

✔ Proven power gains
✔ Better drivability
✔ Safe, reliable calibrations

🎁 Upgrade now, enjoy it all year
⏳ Holiday sale won’t last long
👉 Lock it in before the year ends.

Promo code: holiday2025 (all lower case). Dec 19-Dec 31,2025

12/19/2025

If we’ve tuned your car, this one’s for you.

We’re releasing a limited number of our premium SeoulfulRacing hoodies to past ECU tuning customers only.
Not sold at this price publicly. No restocks.
Same mindset we use for tuning — quality over hype.

• Heavyweight winter-grade hoodie
• Exclusive shop design
• Limited quantities

$49 shipped – tuned client price
Only XL/2XL available. Check out https://sfrusa.3dcartstores.com/SFR-Hoodie_p_1088.html

Please contact us with your order number (if ECU tune was ordered on our website), tuning event (if you were tuned at tuning event), email/social Media messages (if you were tuned at SFR USA in person).

Happy holidays!

11/19/2025

2025 BLACK FRIDAY SALE
Nov 19 - Nov 30, 2025
15% off on any ECU tunes (purchase over $200)

Promo code: 2025blackfri (all lower cases)

11/19/2025

Quick fix on torn up intercooler piping coupler, custom brackets for intercooler, adjusted e-brake tension and modification to the tune done for this

11/03/2025

11/03/2025

A custom tune done after fixing wastegate spring issues/loose couplers and etc on this BK1 2.0