Unitronic Carbon Fiber Intake System with Inlet for 3.0 TFSI B9 S4/S5

Unitronic Carbon Fiber Intake System with Inlet for 3.0 TFSI B9 S4/S5

Marsoni

M251S

$873.00

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

Unitronic Carbon Fiber Intake System with Inlet for 3.0 TFSI B9 S4/S5Description This Carbon Fiber Intake System and Turbo Inlet for the B9 and B9. 5 Audi S4 and S5 is designed to dramatically improve airflow over the factory equipment while supporting both the stock turbocharger and hybrid turbochargers via Unitronic's clever 53mm and 65. 7mm adapter rings. As with all Unitronic Intake Systems, this unit provides improved throttle response, seamless integration and perfect fitment while greatly enhancing turbo

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This KAX air filter was an excellent fit in a 2008 Honda CRV LX. The construction components of the filter (gasket, frame, and filter) are of good quality. I feel good putting this aftermarket filter in the car for the next 12k-15k miles. I took a picture of this filter next to the filter I replaced for frame/size comparison; it is an exact match. Additionally, the filter was wrapped in sealed plastic, boxed, and came with directions.

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Reviewed in the United States on January 27, 2024

Verified Purchase

Andrew Ferguson

Alexandria, US

★★★★★ 3

It's ok

Descent

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Reviewed in the United States on April 5, 2026

Verified Purchase

David Wayne lynch

Omaha, US

★★★★★ 5

Game changer for my truck

Size: 1.9" x 9.9" x 11.4"

I installed this K&N Lifetime Cabin Air Filter in my 2016 F-150 and noticed the difference right away. The airflow is stronger, and the cabin smells fresher even when driving through dusty or humid areas. What I really like is that it’s washable and reusable—so I won’t have to keep buying filters every year. Fitment was perfect and install took under 10 minutes. Just pop out the old one, slide this one in, and you’re good to go. It feels solid and well made, not like those cheap paper ones. It’s definitely worth the investment, especially if you drive a lot or have allergies. Highly recommend for anyone with a Ford or Lincoln vehicle—it pays for itself quickly!

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Reviewed in the United States on July 3, 2025

Verified Purchase

Bill

Draper, US

★★★★★ 5

Fit 2024 F250 Platinum

Size: 1.9" x 9.9" x 11.4"

Good quality, perfect fit.

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Reviewed in the United States on April 16, 2026

Verified Purchase