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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UPDATE: Two tips broke off when unplugging them from the binding post and are now lodged in. Inexcusable and an utterly poor product. Solid connection in the binding post with no wobble or wiggle. They require some force to insert into the binding post, but once they're in they remain snug. I also tried removing and reinserting a few times and the connection remained solid. I've used other plugs in the past that have a softer tip and easily deform after one or two insertions. These do not have that issue.

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Reviewed in the United States on January 11, 2026