Many MX-5 enthusiasts are aware that the original equipment manufacturer (OEM) fill plug on an NA/NB has a square head nut, and the corners often get rounded off due to over-tightening or regular wear and tear, as it is made of mild steel. The most effective way to loosen it is to use a plumber’s wrench, but this often damages the nut.
The HFM.Parts Gearbox fill plug is constructed from Stainless Steel 303 material and features a 17mm hex head design, which is slightly longer to facilitate easier removal.
What's Included
1x Stainless Steel Gearbox Fill Plug
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.
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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