Clutch Master Cylinder Assist Booster, OEM Replacement (30630-05U01)
Suits: R32, R33, R34 GTR & Stagea 260RS (RB26DETT
$399.00
Requirements
The clutch booster sits behind the master cylinder on every RB26DETT GTR. It’s a common point of failure, especially once the master cylinder starts weeping fluid into the diaphragm. When it goes, the pedal gets heavy, inconsistent, or drops assist altogether. Genuine replacements are getting harder to source and the prices reflect it.
This is a direct OEM-spec replacement for Nissan part number 30630-05U01.
Suits: R32 GTR, R33 GTR, R34 GTR, Stagea 260RS (RB26DETT)
Fitment note: This booster does not come pre-adjusted. You’ll need to set the push rod length on install. If you’re using an HFM.PARTS external push rod adjusting tool, run it in the opposite direction to what’s printed on the tool.
Customer Installs
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Our compatibility list is based on OEM specifications. Variations may exist due to vehicle sub-models or other factors — verify fitment before purchasing.
Yes, but run it in the opposite direction to what's written on the tool.
Our Story
We weren't always HFM.Parts; we were Holford Motors. Our brand's identity was forged not in an office, but on the local circuits in the high-stress world of competitive drifting. Our ultimate testbed was our Nissan S14 Drift car, driven by champion Luke Fink. Pushing that car to its limits exposed a crucial truth: achieving genuine, repeatable performance meant relying on components that simply weren't available affordably on the market.
The HFM.Parts brand was born
We made the commitment to design and manufacture the uncompromising, high-quality performance parts that we, as competitive racers, demanded ourselves. Every component you see is a solution conceived, tested, and proven by us. When you choose HFM.Parts, you are investing in components engineered by racers, for racers, ensuring your vehicle delivers its maximum performance potential.
Modifying vehicles is a specialist task and requires the knowledge and experience of competent
individuals to
be conducted safely.
We recommend this product be installed by a competent person. Instructions are given with every
order
where
available, however, If you would like a copy prior to ordering, you're welcome to contact us
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