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Product Details
| Part Number: | V2926 |
| Brand: | Koyo Radiator |
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.
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 2006 | Honda | Civic | Si |
| 2007 | Honda | Civic | Si |
| 2008 | Honda | Civic | MUGEN Si |
| 2008 | Honda | Civic | Si |
| 2009 | Honda | Civic | Si |
| 2010 | Honda | Civic | Si |
| 2011 | Honda | Civic | Si |
4 Reviews ★★★★★
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Alex | September 13th, 2026
Fits like a glove would recommend it
Keoni Smith | April 1st, 2026
Fits like a stock radiator, no modifications or trimming is necessary.
David | April 12th, 2022
Plastic tanks on oem radiator started to separate at seams and leak. This is an excellent upgrade for your cooling system. Easy drop in install no mods running oem fans with room to spare.
Joe | February 17th, 2020
I was going to go with skunk 2 radiator at first but heard good things about this one and thought I would give it a try and I love it kseriesparts has the best workers they helped me out they are very helpful and nice I will be back for more parts thanks guys and gals
