Koyo 06-11 Civic Si Racing Radiator
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Upgrade the cooling system in your 8th-generation Civic Si with the Koyorad V2926 V-Series Aluminum Racing Radiator. Designed specifically for the 2006–2011 Honda Civic Si Coupe and Sedan with the K20Z3 2.0L engine and manual transmission, the V2926 provides increased cooling capacity in a direct-fit package that retains the factory-style mounting arrangement.
Koyorad's 36mm V-Series core is designed to provide excellent heat transfer while maintaining a relatively slim profile. This makes the V2926 especially attractive for performance builds where engine-bay clearance can become an issue with thicker radiators. It's equally at home on a daily-driven Civic Si or a vehicle subjected to autocross, track days, and other demanding driving conditions.
Constructed entirely from aluminum, the V2926 features Nocolok-brazed construction, precise tube-and-fin alignment, a billet aluminum filler neck, and OE-specific mounting points. Unlike a universal radiator that requires fabrication, Koyorad engineered the V2926 as a vehicle-specific replacement that retains provisions for the factory cooling fans and fan shrouds.
Features
- Genuine Koyorad V-Series performance radiator
- Koyorad part number V2926
- Direct-fit application for the 2006–2011 Honda Civic Si
- Fits both FG2 Coupe and FA5 Sedan applications
- Compatible with the 2.0L K20Z3 engine
- Designed for manual-transmission models
- 36mm V-Series aluminum core
- Full all-aluminum construction
- Increased cooling capability compared with the factory-style radiator
- Nocolok-brazed core construction for strength and durability
- Precise tube-and-fin alignment promotes efficient heat transfer
- Vehicle-specific core and tank design
- Billet aluminum filler neck
- Polished aluminum finish provides a clean, performance-oriented appearance
- OE-specific mounting locations
- Designed as a direct bolt-in replacement
- Retains mounting provisions for the factory fan shrouds and cooling fans
- No universal mounting or major fabrication required
- Slim 36mm core helps maintain clearance in crowded engine compartments
- Excellent choice for naturally aspirated, supercharged, and turbocharged Civic Si builds
- Suitable for daily driving, spirited street use, autocross, and circuit racing
- Provides additional cooling capacity for high-RPM K-series engines
- Excellent replacement for an aging factory radiator with plastic end tanks
- Compatible with stock-style radiator hoses and cooling-system layout
- Purpose-built for the 8th-generation Civic Si rather than adapted from a universal radiator
36mm V-Series Core
- The 36mm V-Core is one of the key advantages of the V2926. Koyorad developed its V-Series for applications where a thicker performance radiator could create clearance problems with the engine or other components. It offers an excellent balance between increased cooling performance and available engine-bay space.
- This can be particularly useful on modified 8th-gen Civic Si builds where additional equipment such as turbocharger piping, intake components, catch cans, or other accessories compete for space around the radiator.
Direct-Fit Civic Si Installation
- Unlike many universal performance radiators, the V2926 is engineered specifically for the 2006–2011 Civic Si. Koyorad retains OE-specific mounting locations as well as provisions for the original fan assemblies, allowing the radiator to install without the fabrication normally associated with a universal aluminum radiator.
- Fitment includes the 2006–2011 Honda Civic Si Coupe and Sedan with the 2.0L engine and manual transmission, as well as the 2008 Civic MUGEN Si.
Installation Note
- The Koyorad V2926 is intended for manual-transmission applications and does not incorporate an automatic-transmission fluid cooler.
- The radiator cap is sold separately.
For customers looking to improve the cooling capacity and durability of their 2006–2011 Civic Si, the Koyorad V2926 offers a proven combination of all-aluminum construction, a 36mm performance core, direct-fit installation, and factory fan compatibility without requiring an oversized radiator that consumes unnecessary engine-bay space.
