HKS Adjustable Knob (Inverted)

Marsoni

M251S

$20.00

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

HKS Adjustable Knob (Inverted)SKU: 82004 AK023 UPC: 4957266372067 HKS Adjustable Knob (Inverted) 82004 AK023 for 2004 2021 Subaru Impreza WRX STI Nissan 350Z 370Z Toyota 86 BRZ The HKS Adjustable Knob (Inverted) threads onto Sequential Blow Off Valve preload stems for precise boost response tuning on SQV4 and Super SQV4 valves. It installs directly on Subaru Impreza WRX STI Nissan 350Z 370Z Toyota 86 BRZ and other JDM vehicles equipped with compatible HKS valves. Inverted design

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We offer a 30-day return/exchange service after receiving.
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I use this on many builds to dampen the metal echo in cars, vans, and trucks. Just one sheet in the center of a body panel is a huge difference maker. You can also cover the entire surface and get added insulation value. The noise is greatly depleted and it's easy to install with a roller tool. Looks Great when done. Good Product I will use again!

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Reviewed in the United States on December 29, 2025

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Robert Gheysens

Waukegan, US

★★★★★ 5

Night and day difference

Style: Tech Pack 28 sqft

Stuff works great. Really makes a difference in the sound quality of the vehicle.

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Reviewed in the United States on June 8, 2026

Verified Purchase