Polyester-reinforced silicone construction can handle up to 100F higher underhood temps than OEM rubber hoses
Reverse-flow design aligns radiator thermal gradient more ideally to help dissipate more heat in demanding conditions
Tested to reduce water temps by up to an additional 4.5°F (2.5°C) on cars already equipped with free-flowing grills, upgraded radiator, and vented hoods.
Includes superior, German-style hose clamps with rolled edges to safely and securely hold both hoses in place
ACUiTY's Super-Cooler, Reverse-Flow Silicone Radiator Hoses can help your FK8 to run cooler while using superior materials to help better deal with increased underhood temperatures. By reversing water flow through the radiator, these hoses actually help your FK8 to cool itself more efficiently.
While investigating the overheating issue that affects FK8's in hot conditions, ACUiTY engineers determined that the radiator can reject more heat if the water flow through it is reversed. This is due to how the intercooler rejects heat from charge air and how that heat flows through the lower part of the radiator. In very hot conditions on cars that also have upgrades like hood venting and an upgraded radiator, water temps were reduced by as much as an additional 4.5°F (2.5°C) after installing these hoses. On totally stock cars temperature reduction is lower, close to 1°F (0.6°C) in hot conditions. In addition to this extra cooling power, the polyester-reinforced silicone construction helps the hoses to handle up to 100F hotter temperatures than the stock EPDM rubber hoses. As an added benefit, the kit includes German-style hose clamps that have formed threads and rolled edges to help protect your radiator hoses from the cutting damage that traditional hose clamps often cause on silicone hoses. Each set comes with 2 silicone radiator hoses and 4 German-style hose clamps.
Below is an illustration that shows an approximation of the temperature gradient on the radiator with the stock water-flow direction and radiator hoses. Note how the hotter part of the radiator (top) is where the cooler air coming through the top grille comes in, while the cooler, lower part of the radiator is where the hotter air exiting the intercooler passes through the radiator. Because the water exiting the radiator is nearly the same temperature as the air entering the bottom of the radiator, this setup can render the lower half of the radiator ineffective in hot climates.
In contrast, below is an illustration that shows an approximation of the temperature gradient on the radiator with ACUiTY's Super-Cooler hoses. By flipping the flow through the radiator, the hotter water is at the bottom, being cooled by the hot air exiting the intercooler, and the colder water exits out the top, where cool air is passing through the radiator after entering through the upper grille. This reversed flow more ideally aligns the radiator thermal gradient with the thermal gradient of the air passing through the radiator which helps the radiator to dissipate heat more effectively.
Tech Video
Check out our brief tech video below for the science behind how these hoses help to improve cooling in your FK8.
Install is pretty straightforward
Both the quality and fitment of the part are on par with what you would expect from this company.
NVH increase over the oem mount is barely noticeable, there is a very minor vibration that is felt at idle but once driving you dont feel it at all.
The engine feels much more stable under wot now and to top it off the part looks good too
Opting for the 2-step performance shipping protection was an absolute no-brainer. When investing in high-end components, the transit phase can often introduce unnecessary anxiety. This service effectively mitigates that risk, offering complete peace of mind and transforming what is usually a stressful waiting period into a seamless, secure experience.
I ordered the red one for the 11th gen Civic SI. Well packaged and came with a Wunderladen sticker. This is a big upgrade over the cheap plastic orange dipstick that came with the car. Its worth the money to be able to reliably read your oil level, especially on a direct injected turbo car.
