Unitronic Stage 2 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Unitronic Stage 2 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Marsoni

M251S

$765.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Unitronic Stage 2 ECU Performance Tune C8 RS6 / RS7 4.0TFSIUnitronic Stage 2 : 819HP 760LB FT STOCK POWER: 621HP 627LB FT For Audi C8 RS7 Performance 4. 0 TFSI EA825 Change Vehicle Octane 93 Octane 98 Ron gas 91 Octane 95 Ron Gas HP +198 LB FT +133 Description Unitronic Stage 2 Performance software is precisely calibrated for use with 93 AKI 98 RON fuel. NOTE: An SFD SFD2 unlock may be required for some MY23+ models. Click HERE for more information or contact Unitronic to learn more today. Power figures may

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We offer a 30-day return/exchange service after receiving.
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As mentioned in another review, you cannot change the angle of the phone so it faces the other way since it does not swivel. Wish I wish I would have known that before placing it. Also, the charger is REALLY slow. It’s slower than the MagSafe chargers I have in my house. I’m not sure if this is defective. I only used it on my way home from work, and I will be returning it.

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Reviewed in the United States on May 8, 2026

Verified Purchase

diane gammons

Pawtucket, US

★★★★★ 5

Almost perfect

Style: Screen+Charger

Solid mount. I’ve tried other ones but they don’t sit as nicely as this one. It also has a lot of adjustments to allow for using it any way you need it to so it is very versatile. The magnet strength is really good and holds my phone really well. Sometimes it feels too strong which I guess is a good thing. The charging works well but I wish the cable was a little longer

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Reviewed in the United States on April 21, 2026

Verified Purchase

Jin

Lake Worth, US

★★★★★ 5

Great Phone Mount

Style: Screen+Charger

Works great! It’s been a fantastic upgrade for my car. The installation was quick and seamless, and it fits perfectly with the Tesla interior. The wireless charging stays fast and stable. I highly recommend it.

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Reviewed in the United States on May 13, 2026

Verified Purchase

Todd Wahl

Dallas, US

★★★★★ 4

Almost Perfect But With Workaround it Rocks

Style: Dash+Screen+Qi2 Charger, Style: Dash+Screen+Qi2 Charger

This works almost perfectly in my Tesla, with one small tweak for hot summer conditions. It holds my phone very well overall—I position it slightly off-center at about the 10 o’clock position. However, with a larger phone like the Galaxy S25 Ultra, the combination of weight and summer heat can cause the mount to slowly rotate as the suction cup loses some grip. I found a simple fix that works extremely well: applying a small amount of rosin (the same kind used for violin bows) to the friction point where the rotating arm meets the suction base. That added grip completely solved the issue. Now the mount stays exactly where I position it, even in the heat. Solid product, and with that minor adjustment, it performs exactly how I need it to.

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Reviewed in the United States on May 3, 2026

Verified Purchase

Kady

Bozeman, US

★★★★★ 5

Great product.

Style: Holder+Dash+Vent+Windshield

This worked perfectly in my vehicle making hands free driving easy. Installation was very simple, easy to charge my phone in this mount. Very stable, my phone never fell out or off.

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Reviewed in the United States on April 25, 2026