King Shocks 3.75 ID Coil Spring 10" x 300lb

King coil springs are manufactured in the USA to our specifications using the highest quality high-tensile chrome silicon wire. Our springs are not simply rebadged off-the-shelf springs; they are specifically engineered for off-road use. Spring rates, wire diameters, and coil lengths have been developed through field testing on every type of terrain. Our race-proven designs have been tested in the harshest battles from Baja to Dakar. All springs feature closed and ground ends, allowing them to sit flat and deflect accurately. We offer one of the largest selections of springs to cover a wide range of applications. We sell thousands of springs per month with almost zero returns, but we provide our buyers with a lifetime warranty against sagging or breakage. Should a spring fail for any reason, we will gladly replace it without question. Our customer support is to the same high standard as our product quality and performance. The experience of riding on King products is exceptional.

Before Ordering

〇 Regarding Import Consumption Tax
At the Shaftoya shopping site, we cover the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.

〇 Checking Compatibility
Since our entire product database is based on North American vehicles (USDM), please confirm whether parts can be installed on Japanese domestic vehicles (JDM) before placing your order. (If you are unsure whether 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 filtered 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 payment. Shipping estimates are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, there may occasionally be a significant discrepancy between the automatically calculated shipping cost and the actual shipping cost. In such cases, we will contact you individually via email.

In principle, all products are shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please allow sufficient time when placing your order. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported by air; they are never shipped by sea freight.

○ Regarding Compliance with Japanese Vehicle Inspection (Shaken)
Essentially, all products we handle are designed and manufactured outside of Japan. Please be aware that they are not compliant with the "Japanese Vehicle Inspection (Shaken) system," and we cannot provide strength calculation documents or similar paperwork for the Japanese inspection system. Therefore, all parts are sold for the purpose of "use on circuits, private land, or off-road," and installation and use are at your own risk.

○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside Japan, there may be shipping damage to the packaging or the product itself. Please understand that for items with shipping damage, defective products, or incorrect items, we will only handle returns, refunds, or replacements if you contact us within 7 days of receipt. Furthermore, for products sold through our company, all warranty-related support will be handled "exclusively through us." Please note that we do not coordinate with other companies or agencies located within Japan for these services.