Valvetronic Porsche GT3 991.1 / 991.2 Valved Sport Exhaust System

Valvetronic Porsche GT3 991.1 / 991.2 Valved Sport Exhaust System

Marsoni

M251S

$2199.45

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

Valvetronic Porsche GT3 991.1 / 991.2 Valved Sport Exhaust SystemThe FULL RSR experience. This system is truly unparalleled in sound quality. In the quest for the most incredible, highest pitched, and most enjoyable sound characteristic possible, our last year and a half of research and development has led us to a sound experience that must be heard in person to be believed. For the 991 generation of the GT3 The DFI engine was chosen in favor of the Mezger and many people were afraid that it would lose its classic

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Fast: 2-3 business days
Express: 1-2 business days

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As another reviewer pointed out, the OEM paper filter is almost 3 times thicker than this one. All things equal, thicker would mean for filtering surface area. So with less filter media surface area, the filter would clog up quicker. However, since this is washable, maybe that's a moot point. I also noticed on my Hyundai Tucson, the rim of this filter must be slighter thicker because I had a tougher time clipping the filter box closed with this one installed. I am keeping my OEM for now, just in case.

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Reviewed in the United States on December 6, 2025

Verified Purchase

Nasir A.RAHMAN

San Leandro, US

★★★★★ 5

PhilTop engine filter 1/2 the price of K&N filter No difference

Not much difference than K&N filter But 1/2 the price 100% identical

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Reviewed in the United States on April 17, 2026

Verified Purchase

Julie

Houston, US

★★★★★ 5

Perfect fit for my 2018 Civic—easy, affordable, and worth it

Size: 9.5" x 10.9" x 2.1"

I’ve bought this cabin air filter multiple times for my 2018 Honda Civic, and it’s consistently great quality. It fits perfectly and is super easy to install—takes just a few minutes to swap out, and I always do it myself. Way cheaper than going to a shop or dealership. The airflow is smooth, there’s no smell at all, and it keeps the inside of my car feeling clean and fresh. No weird odors, no dust blowing in—just a solid, dependable filter that does its job well. This is the only one I’ll keep buying.

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Reviewed in the United States on May 11, 2025

Verified Purchase

Michael Howard

Carnegie, US

★★★★★ 5

Do it mayne

Size: 9.5" x 10.9" x 2.1"

Good quality and fit but find it funny that the instructions with the air flow are on the side. I assume that would be facing out and was annoyed when I tried to close and it didn’t fit. Probably should have read the directions. Still would recommend

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Reviewed in the United States on March 8, 2026

Verified Purchase

Kcfangue

Charlottesville, US

★★★★★ 5

Perfect fit, durable and affordable

Size: 9.5" x 10.9" x 2.1"

Ordered this for our 2023 Honda civic. Great fit, durable and very affordable. Was so easy to pull old one out and replace new one. Will be ordering again.

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Reviewed in the United States on November 3, 2025