11th Gen Civic Type R Radiator Hoses: Fitment FAQ
By ACUITY Instruments: Performance Automotive Products | Published: 2026-11-03
Category: 操作指南
Straight answers on silicone radiator hose fitment for the FL5 Civic Type R and Integra Type S, including reverse-flow routing and when the upgrade is worth it.
Quick answer
If you drive an FL5 Civic Type R or 5th Gen Integra Type S and want hoses that tolerate higher underhood heat plus a reverse-flow layout that can trim water temps slightly, the ACUITY Super-Cooler reverse-flow silicone hoses are a direct-fit option. They are most worthwhile once you already have a free-flowing grille, upgraded radiator, or vented hood.
Why the reverse-flow layout matters on an FL5
The factory coolant path sends hot coolant through the radiator in a direction that does not match the radiator's natural thermal gradient as closely as it could. A reverse-flow hose set flips that path so the coolest part of the radiator does the final cooling, which the catalog notes can lower water temps by up to an additional 4.5°F (2.5°C) on cars already running a free-flowing grille, upgraded radiator, and vented hood. On a stock car, expect the gain to be smaller, and treat the silicone construction and heat tolerance as the main reasons to buy.
Where the hoses do not help
If your FL5 is otherwise stock and you are chasing a large coolant temperature drop, hoses alone will not deliver it. The reverse-flow benefit depends on the rest of the cooling system being able to take advantage of it. Spend on airflow and radiator capacity first if peak track temperatures are your concern, then add the hoses as a finishing piece.
Fitment and install questions
- Will these hoses fit my 11th Gen Civic Type R?
- Yes. The set is listed for the 11th Gen Honda Civic Type R (FL5) and the 5th Gen Acura Integra Type S, which share the same cooling layout. Confirm your model year against the product listing before ordering, since the catalog does not list separate trims.
- Do they fit the Acura Integra Type S too?
- Yes. The same hose set is listed for the 5th Gen Integra Type S, so the installation steps and ECT2 relocation apply to both cars.
- What does the reverse-flow radiator hose install involve?
- You replace the upper and lower radiator hoses with the reverse-flow routing, then relocate the ECT2 sensor using the included hardware. Plan to drain and refill coolant, bleed the system fully, and check for leaks at both hose ends before driving hard. Bleed the cooling system completely before your first hard pull; trapped air skews temperature readings.
- Do I need a tune or other cooling mods first?
- No tune is required. The catalog's 4.5°F (2.5°C) additional reduction figure assumes a free-flowing grille, upgraded radiator, and vented hood, so treat those as the supporting mods that make the reverse-flow benefit measurable.
- Will the silicone hoses last longer than OEM rubber?
- The silicone is rated for up to 100°F higher underhood temperatures than OEM rubber, which is the main durability argument. The catalog does not state a service life, so inspect the hoses at your usual coolant service interval rather than assuming a fixed replacement mileage.
Product facts
- Super-Cooler, Reverse-Flow, Silicone Radiator Hoses for the 11th Gen Honda Civic Type R and 5th Gen Acura Integra Type S: Polyester-reinforced silicone construction rated to handle up to 100°F higher underhood temperatures than OEM rubber hoses. That extra heat margin matters on a turbocharged FL5 that sees repeated heat soak, where rubber hoses age faster.
Super-Cooler, Reverse-Flow, Silicone Radiator Hoses for the 11th Gen Honda Civic Type R and 5th Gen Acura Integra Type S - Super-Cooler, Reverse-Flow, Silicone Radiator Hoses for the 11th Gen Honda Civic Type R and 5th Gen Acura Integra Type S: The kit includes hardware to relocate the ECT2 sensor for more accurate water temperature readings. Relocating ECT2 means the temperature you log or watch on track reflects the coolant more accurately after the reverse-flow change.
