Unitronic Performance Downpipe for B9 S4/S5 3.0TFSI

Unitronic Performance Downpipe for B9 S4/S5 3.0TFSI

Marsoni

M251S

$1317.49

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

Unitronic Performance Downpipe for B9 S4/S5 3.0TFSIDescription The Unitronic Performance Downpipe for the 2017+ S4 & S5 3. 0TFSI EA839 (CWG) engine is a direct bolt on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance the exhaust note. It utilizes a 6 400cpsi ultra high output catalytic converter, designed in partnership with Unitronic, from our emissions partners at Global Emissions Systems Inc (GESi). Paired with Unitronic Stage 2

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It took a few tries to get it positioned exactly as i wanted it but once that was done it hasn't moved. I have a Samsung s25fe phone with a case and it fits just fine. Seems secure. It does shake slightly while driving on bumpy roads but it doesn't move positions and I don't feel like my phone is going to fall. So far it's been great.

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Reviewed in the United States on May 13, 2026

Verified Purchase

Java

New York, US

★★★★★ 5

Quality cell phone mount.

The best cell phone mount I ever used. Quality is obvious after you easily install. This hasn’t moved since I placed it in my car. I like that it doesn’t block the air vent too. (You can move any angle you like). Won’t disappoint! Good buy!

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Reviewed in the United States on May 1, 2026

Verified Purchase

Norm E

Alexandria, US

★★★★★ 5

Good working Cell Phone mount

Easy to install in vent, works very well.

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Reviewed in the United States on May 11, 2026

Verified Purchase

Paul