PRODUCT DETAILS
Koyo Aluminum Radiator - 2011-2016 Honda CR-Z / 2009-2014 Honda Fit (Manual Transmission)
Your CR-Z or Fit's got a radiator that's been in there for 10-15 years. Plastic end tanks. Thin stock core. It's doing its job now but the plastic's getting brittle and the core's probably starting to clog with corrosion. You know where this is going. It's going to crack when you're not expecting it. Koyo's all-aluminum radiator replaces the entire stock setup with a hand-TIG-welded aluminum unit. No plastic tanks to crack. Just a 1-inch thick Hyper Core with Nocolok brazing and aluminum end tanks. That's 50% thicker than the stock core. You're getting way more coolant volume and way more surface area for heat transfer. This radiator bolts right into your CR-Z using the stock fan shrouds and stock hoses. For the Fit, you might need to tweak the top two fan shroud mounts slightly or swap to CR-Z shrouds for a perfect fit. Either way, you're pulling the old radiator and bolting this one in. Koyo's Japan's largest aftermarket radiator manufacturer and they're hand-assembling these in their own factories with triple pressure testing. This isn't a cheap eBay radiator. This is a Koyo.
Here's What's Wrong with Your Stock Radiator
The stock CR-Z and Fit radiators use aluminum cores with plastic end tanks crimped to the sides. The plastic's the problem. After 10-15 years of heat cycling, it gets brittle. The tanks crack around the filler neck or the inlet/outlet connections. The crimped seams start weeping coolant. We've seen these radiators with hairline cracks that are seeping coolant slowly. The owner doesn't notice until the coolant level's a quart low and the temp gauge is climbing. One day the crack opens all the way and you're stuck with coolant pouring out. The core's also thin. The stock core's around 16-18mm thick. It's fine for a bone-stock car that's never been pushed hard. It's not fine if you're tracking your CR-Z, if you're running a turbo Fit, or if you're just driving in stop-and-go traffic on a 95°F day with the A/C on. Koyo's radiator is all aluminum. Hand-TIG-welded end tanks so there's no crimped seam to leak. The Hyper Core is 1 inch (25.4mm) thick. That's 50% thicker than stock. More thickness means more tubes, more coolant volume, and more fin surface area. You're moving way more heat than the stock radiator ever could.
1-Inch Hyper Core with Nocolok Brazing
Koyo uses their Hyper Core design on this radiator. That's a 1-inch thick core with high-efficiency louvered fins. The fins are cut and bent to create turbulence in the airflow. Turbulent air pulls more heat out of the fins than smooth laminar air. The core's Nocolok-brazed. That's vacuum brazing where the aluminum's heated in a controlled atmosphere and the joints are fused together without solder. It's stronger and more uniform than traditional soldering. The tubes aren't going to separate. The fins aren't going to fall off. Koyo hand-assembles every core and then hand-TIG-welds the aluminum end tanks to the core. Each radiator's triple pressure-tested before it ships. They're not sending out radiators that leak. If it leaks, it didn't leave the factory. This is the same quality control that made Koyo the OEM supplier for half the Japanese manufacturers. The radiator comes with a brushed aluminum finish. It doesn't look like a cheap radiator. It looks like something you'd see on a built car.
You Need a Koyo SK-C13 Cap - Stock Cap Won't Fit
The stock CR-Z and Fit radiator caps don't fit this radiator. The filler neck's a different design and it needs a deep plunger-style cap. You need a Koyo SK-C13 radiator cap or an equivalent aftermarket cap with a deep plunger. Don't try to use your stock cap. It won't seal. You'll have pressure loss and coolant burping out the overflow. The Koyo SK-C13 is a 1.3 bar (18.85 PSI) high-pressure cap. That's higher than the stock 1.1 bar cap. Higher pressure raises the boiling point of your coolant from around 250°F to around 257°F. That extra headroom matters when you're sitting in traffic or when you're on the throttle hard. Buy the cap when you buy the radiator. Don't find out the hard way that your stock cap doesn't fit when you're trying to close everything up and the cap's not sealing.
Fits CR-Z Perfectly, Fits Fit with Minor Tweaks
This radiator's a direct bolt-in for the 2011-2016 CR-Z. The OEM fan shrouds bolt right up. Your stock hoses connect. Your A/C condenser mounts in the stock location. You're pulling the old radiator and bolting this one in. No cutting. No drilling. No custom brackets. For the 2009-2014 Fit, it's almost a direct bolt-in. The two innermost fan shroud mounting tabs on the top tank might need slight modifications to get the shroud to bolt up. We're talking about filing the tabs slightly or drilling the shroud holes out by a millimeter. If you don't want to mess with that, you can swap your Fit fans into OEM CR-Z outer shrouds (Honda parts 19015-RBJ-004 and 38615-RBJ-003) and those bolt right up with no modifications. Either way you're looking at a couple hours to install. Drain the old coolant, pull the old radiator, bolt in the Koyo, refill with fresh coolant, burp the air out, and you're done.
What You Get
- Koyo all-aluminum radiator for 2011-2016 CR-Z / 2009-2014 Fit (manual transmission only)
- 1-inch (25.4mm) thick Hyper Core (50% thicker than stock 16-18mm core)
- Hand-TIG-welded aluminum end tanks (no plastic to crack)
- Nocolok-brazed core with high-efficiency louvered fins
- CNC-machined billet aluminum filler neck (requires Koyo SK-C13 cap or equivalent deep plunger cap)
- Billet aluminum drain plug included
- Brushed aluminum finish
- Triple pressure-tested at factory
- Direct bolt-in for CR-Z (stock fan shrouds, stock hoses, stock A/C condenser mounts)
- Fits Fit with minor fan shroud tab modifications or CR-Z shroud swap
- Made by Koyo in Japan
Fits These Cars
- 2011-2016 Honda CR-Z 1.5L Hybrid (manual transmission only)
- 2009-2014 Honda Fit (manual transmission only, may require minor fan shroud modifications or CR-Z shroud swap)
Note: Manual transmission only - automatic cars use different radiators. Stock radiator cap does NOT fit - must use Koyo SK-C13 or equivalent deep plunger-style cap (sold separately). Buy cap when you buy radiator. CR-Z installation is direct bolt-in using stock fan shrouds, stock hoses, stock A/C condenser mounting. Fit installation may require slight modifications to two innermost fan shroud mounting tabs on top tank (file tabs or drill shroud holes slightly) OR swap Fit fans into OEM CR-Z outer shrouds (Honda parts 19015-RBJ-004 and 38615-RBJ-003) for plug-and-play fitment. All-aluminum construction eliminates plastic end tank failures (stock has plastic tanks that crack after 10-15 years). Hand-TIG-welded end tanks and Nocolok-brazed core (no crimped seams, no solder joints). 1-inch (25.4mm) thick Hyper Core is 50% thicker than stock 16-18mm core (more coolant volume, more tube surface area, better heat transfer). High-efficiency louvered fins create airflow turbulence for better heat extraction. Each radiator hand-assembled and triple pressure-tested at Koyo factory in Japan. CNC-machined billet filler neck and billet drain plug. Brushed aluminum finish. Made by Koyo - Japan's largest aftermarket radiator manufacturer and OEM supplier. Installation takes 2 hours (drain old coolant, remove old radiator, install Koyo, refill coolant, burp air).
2009-2014 Honda Fit