King Shocks 3.75" ID Coil Spring 16" x 400lb

King coil springs are manufactured in the USA to our own specifications using the highest quality high-tensile chrome silicon wire. Our springs are wound specifically for off-road applications and are not repurposed automotive springs. Spring rates, wire diameters, and coil lengths were developed through extensive field testing across all types of terrain. Our race-winning designs have been proven in the toughest battles from Baja to Dakar. All springs are closed-coil and ground-finished to sit flat and flex straight. We offer the largest selection of springs to suit your specific application. Despite selling thousands per month, we have almost zero returns, and we offer a lifetime warranty against sagging or breakage to the original purchaser. You can rest assured in the unlikely event of an issue. Should a spring ever fail, we will gladly replace it, no questions asked. Our customer support is as top-tier as our quality and performance. King products provide a ride quality like no other.

Before You Order

〇 Regarding Import Consumption Tax
At Shaftoya Shopping Site, we pay the import consumption tax incurred at the time of import on your behalf, so there are no additional charges beyond the total amount paid at checkout.

〇Compatibility Check
Our entire product database is based on North American market vehicles (USDM), so please verify compatibility with Japanese market vehicles (JDM) before placing your order. (Please feel free to contact us if you are unsure whether a listed product is compatible with your vehicle. Our support team will be happy to look into it for you.)
If you place an order without verifying compatibility, we cannot accept returns due to fitment issues.
Please note that even if products are filtered by selecting the year, manufacturer, and vehicle model using the tabs on our homepage, it does not necessarily guarantee a direct fit on Japanese-spec vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us if you have any questions before ordering.

○ 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 cost for large items such as body parts. In such cases, we will contact you individually via email.

Basically, all products are shipped internationally from our U.S. warehouse. Unlike domestic shipping within Japan, international shipping takes approximately 7 to 14 days, so please allow plenty of time for your order to arrive. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported via air freight. They are never shipped by sea.

○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
The products we handle are fundamentally designed and manufactured outside of Japan. Please be aware that they are not compliant with the "Japanese Vehicle Inspection System," and we are unable to provide strength inspection reports or similar documentation for Japanese inspection purposes. Therefore, all parts are sold for the purpose of "use on circuits, private property, 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 is a possibility of delivery damage to the packaging box or the product itself. Please understand that we will only provide returns, refunds, or replacements for damaged, defective, or incorrect items if notified within 7 days of receipt. Additionally, for products sold through our company, all warranty-related support will be handled "exclusively through us." Please note that we do not facilitate support through other companies or distributors located within Japan.