Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Marsoni

M251S

$680.00

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

Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSIThese software upgrades are entirely compatible with the UniCONNECT+ cable, Which allows you to tune your vehicles directly through the OBD 2 port within minutes, from the comfort of your own home. Features Optimized Responsiveness, Smoothness, Drivability, and Comfort Unitronics ECU calibrations are engineered to improve engine response and reduce low end lag. Unitronics Performance Software has gained worldwide recognition and is well known for its

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
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I was surprised to see a reusable cabin air filter listing for my car. I didn't know such a thing existed. And they're the same price as a name brand disposable. I hate sending things off to the landfill, so being able to wash and re-use this, even if it breaks down after a few washings, is still saving the landfill and my pocket book. Quality feels excellent. Fit is tight, but with a bit of persistence it squeezes in. Sure, I realize this won't have the same micron level as a disposable, but, I routinely open doors and windows, and these filters area about catching the big stuff for me - not the molecules I can't see and get blown in as I enter/exit anyway. Super quality piece, I wish there was a fitment available for all my cars. I'm definitely keeping my eye out!

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Reviewed in the United States on September 12, 2025

Verified Purchase

Chelsea, US

★★★★★ 5

Size fit, well made and washable!!!

Style: HCC1017-X

After buying filters for ever, I came across this product. Well, why not? Washable? I got two so I can use the other after washing one. The filter fit inside the holder, it was a bit tight but fit for my 2006 Toyota Highlander. It is definitely more dense than regular filters, very well made. I will be looking now for a washable engine filter too.

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Reviewed in the United States on April 13, 2026

Verified Purchase

Bradley Collier

Bozeman, US

★★★★★ 5

2 piece filters but perfect fit

Style: HCC2143-X

It's a 2 piece filter, which seems strange but...the 2 filters fit perfectly side by side. Both filters have a loop to help with removal for cleaning. Just installed and haven't driven or used a/c yet. Hopefully the filters breath well.

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Reviewed in the United States on April 17, 2026

Verified Purchase

LEO

Carnegie, US

★★★★★ 5

Worth every penny

So far so good better than the plain cabin air filter , last longer and price is right so it’s a win win for me

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Reviewed in the United States on April 23, 2026