Super-Cooler, Reverse-Flow, Silicone Radiator Hoses for the 11th Gen Honda Civic Si and 5th Gen Acura Integra Base/A-Spec

ACUiTY's Super-Cooler, Reverse-Flow Silicone Radiator Hoses can help your Civic or Integra 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 Civic or Integra to cool itself more efficiently.

These hoses were developed as part of a project to help HRC (Honda Racing Corporation) cool their race cars more efficiently; 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 3.6°F (2°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 handle temperatures up to 100°F hotter 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. The illustration is borrowed from our Super Cooler hoses for the FK8, but the same principle applies to the 11th Gen Honda Civic Si and 5th Gen Acura Integra Base/A-Spec. Note how (in the stock configuration) 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 same 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 passes 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.

Click here to access all of ACUiTY's install guide PDFs and install guide videos for this product and many others. 

Fits:

• 2022+ Honda Civic Si (and all trims with 1.5t engine, 11th Gen)
• 2023+ Acura Integra Base and A-Spec (5th Gen)

• 1x Hot Radiator Hose 
• 1x Cold Radiator Hose
• 4x German-style hose clamps

Please note that all shipments ship the business day (mon-fri, except on holidays) after they are received. 

Next-Day Shipping Policy:

Shipments are sent only after payment has been received. ACUITY Instruments LLC reserves the right to delay shipments temporarily if credit card fraud is suspected. ACUITY Instruments LLC ships all orders on the next business day. This means that if you purchase the "next day" shipping option, next day shipping will go out the next day, meaning a total transit time of 2-days. Similarly, 2-day shipping takes 3 days since the order is filled the next day. If you require faster shipping, we recommend you contact one of our vendors that carries inventory.

Shipping Options:

Everyone loves lots of shipping options! We offer USPS, UPS, and FedEx shipping options for domestic (within the United States) shipments and USPS, UPS, FedEX and DHL for international shipments. For your convenience, we offer shipping options with transit times as low as 2 business days. At this time, we do not offer next-day shipping options. 

Shipping Insurance and Signature Policy:

Acuity insures all packages it ships. This insurance covers damage to or loss of the product while in transit only. This does not cover theft of the package after delivery. Because of this, a signature is required for delivery of all orders over $100 (before shipping costs). If you will not be available to receive the shipment, many carriers permit the recipient to leave a note on the door instructing them to leave the package. If you choose to do this, please remember that Acuity Instruments LLC cannot insure packages that are stolen.

Free Shipping Options:

Occasionally we offer shipping specials where orders over a certain amount are free. If we are offering this, you will see the free shipping option in your cart at checkout. If no options is visible at checkout, then either there is currently no free shipping offer or you are not in a zone that qualifies for free shipping. Most states in the continental USA qualify when a shipping special is being ordered. There is no choice of carrier for free shipping, but typically we will ship your order will likely ship using either USPS or FedEx. If you'd like a faster delivery, you can opt out of the Free Shipping option in favor of a faster, paid, shipping option.

Taxes on International Shipments:

It is against Acuity's policy to falsify tax documents during the shipment of goods to locations outside of the USA. The tax documents for your shipment will reflect the price you paid for the parts. Please do not contact us requesting us to falsify tax documents so that you do not have to pay taxes on the shipment as we cannot do this.

Guaranteed Times by Carriers and Related Reimbursements:

On some shipping services, like USPS Priority Express, the service provider (USPS, UPS, DHL etc) will offer a shipping reimbursement if the order does not arrive on time. ACUITY does not assume responsibility for tracking these matters. If you suspect your service may have a delivery-time guarantee and was delivered late, please contact us with the order # and delivery info. Please note that a full refund is typically not provided by the carrier. ACUITY does not offer full reimbursement of shipping costs, but ACUITY will pass on 100% of any reimbursement for shipping costs from the carrier to the customer.

Domestic Transit Times:

For orders shipping within the continental USA, USPS First Class shipments will usually take around 5-7 business days for delivery. USPS Priority usually takes closer to 2-4 business days, and Priority Express usually takes about 2 business days. Your exact transit time will vary based on your location. 

International Transit Times:

USPS First Class International shipping is very economical, but the transit time can be very slow. Please allow up to 4 weeks for delivery of orders shipped via USPS First Class International. USPS Priority mail is typically faster, normally taking closer to 2 weeks. USPS GXG is faster still, typically taking only about 1 week. Your exact transit times will vary depending on your location, and it is possible that your exact transit time will exceed the values provided here. For best results on international shipments, however, we recommend avoiding USPS options in favor of FedEx, UPS, or DHL shipping methods.

Warranty Requests

All ACUITY products are covered by a 1-year warranty against manufacturer defect. Please keep a copy of your receipt as a proof of purchase when contacting ACUITY with a warranty request. Please do not ship back any merchandise without a Return Merchandise Authorization (RMA) number. Contact ACUITY to receive an RMA number.

Returns

Customers are responsible for all return shipping charges. Please do not ship back any merchandise without a Return Merchandise Authorization (RMA) number. Contact ACUITY to receive an RMA number.  ACUITY permits returns with no fees if the product is returned within 14 days of delivery, if it is unopened and in its original packaging. If the product has been removed from the original packaging, has not been installed in any way, and requires repackaging but is in 100% sale-able condition (to be determined by ACUITY) a restocking fee will be assessed in an amount equal to the greater of $5 or 10% of the cost of the product. ACUITY will not refund any shipping and handling fees related to a returned purchase. Valid proof of purchase must be provided to receive an RMA number. Any purchases made through one of ACUITY's vendor's are subject to that vendor's return policies. ACUITY cannot accept the return of an item purchased through a vendor without the consent of ACUITY and said vendor. Please Note: If 2 items were ordered and the order qualified for free shipping, but the return of 1 of the 2 items brings the new invoice amount (after your refund) below $100, the original cost of shipping will be debited from your refund, since the order would no longer be eligible for free shipping.