Key Features
Ideal kit for bypassing the cabin heater on LS family engines (such as LS1, LT1, LQ9) with 5/8-inch and 3/4-inch heater supply and return ports.
Lowest profile heater loop on the market (3 inches tall).
Eliminates concerns about air pockets that can occur when capping off heater lines.
Withstands extreme high-temperature and high-pressure operating conditions. Max. temperature rating: 350°F (177°C).
Includes HPS 100% stainless steel industrial-grade embossed hose clamps that will not cut the silicone hose.
The HPS High-Temp 4-Ply Reinforced Silicone Bypass Loop Kit is designed to bypass the cabin heater on LS family engines (such as LS1, LT1, LQ9) featuring 5/8-inch and 3/4-inch heater supply and return ports. This easy-to-install loop eliminates the worry of air pockets that can form when capping off heater lines. This product is the lowest-profile heater loop on the market, standing just 3 inches tall. Engineered for extreme high-temperature use and prolonged exposure to under-hood heat, this race-proven design can withstand the toughest operating conditions. Includes 100% stainless steel embossed hose clamps for easy installation. Maximum temperature rating: 350 degrees Fahrenheit.
Before Ordering
〇 About Import Consumption Tax
At Shaft-ya Shopping Site, we pay the import consumption tax incurred upon import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
〇Confirmation of Compatibility
All product databases are based on North American vehicles (USDM), so please confirm compatibility with Japanese domestic vehicles (JDM) before placing your order. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to look it up for you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, make, and model on the tabs on our top page, it does not necessarily mean they will fit Japanese model vehicles without modification.
All product information is 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. For large items such as body parts, the actual shipping cost may occasionally differ significantly from the amount automatically calculated. In such cases, we will contact you individually by email.
All products are fundamentally shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes approximately 7 to 14 days, so please allow ample time when ordering. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported by air. We do not ship by sea.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
All products we handle are designed and manufactured outside of Japan. Please understand that they are not compliant with the "Japanese Vehicle Inspection (Shaken) system," and we are unable to provide strength analysis 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. Since all products are shipped internationally from outside Japan, there may be shipping damage to the packaging or the product itself. For products with shipping damage, defective items, or items different from your order, we will provide returns, refunds, or exchanges only if you contact us within 7 days of receipt. Please understand that for products sold through us, 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 matters.