The Mazworx main stud kit is a new design that improves upon existing main stud kits on the market.
Due to the increased length, more engagement is achieved. Made of stronger ARP 2000 material capable of achieving a clamping load in the 215,000–220,000 psi range.
Also, there is no need to machine clearance for the upper oil pan.
Made of ARP2000 material
-12 Point
- Tensile strength 220ksi
- Straight shank from the very bottom/bullet nose
Before placing your order
○ Regarding import consumption tax
At the Shafutoya shopping site, we cover the import consumption tax incurred upon importation, so there will be no additional charges beyond the total amount paid at checkout.
○ Verification of compatibility
Our entire product database is based on North American vehicles (USDM), so please verify compatibility with Japanese vehicles (JDM) before placing your order. (If you are unsure if a listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to check for you.)
If you place an order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, manufacturer, and vehicle model using the tabs on our top page, this does not necessarily mean they will fit Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○ Regarding shipping
Shipping costs are paid at the time of checkout. Shipping estimates are calculated automatically once you enter your shipping address on the checkout page. In rare cases, there may be a significant discrepancy between the automatically calculated shipping cost and the actual shipping cost for large items such as body parts. In such cases, we will contact you individually by email.
All products are generally shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please allow plenty of time for your order. If you are in a hurry, please contact us in advance to confirm delivery times. Please note that all products are transported by air. They are not shipped by sea freight.
○ Regarding Japanese vehicle inspection (Shaken) compatibility
All products handled by our company are basically designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese vehicle inspection system," and we cannot provide strength study documents for this purpose. Therefore, all parts are sold for "circuit, private property, or off-road use only," and installation and use are at your own risk.
○ Regarding warranty
Please check the contents immediately upon receipt of your product. Since all products are shipped internationally from outside Japan, there may be shipping damage to the packaging or the product. Please understand that we will only provide returns, refunds, or replacement items for products with shipping damage, defective products, or items different from what was ordered if you contact us within 7 days of receipt. Please also note that for products sold through our company, all warranty support will be handled "exclusively through our company." We do not provide support through other companies or distributors located within Japan.