Introducing the BEST cooling system upgrade for 96-02 4Runners & 95-04 Tacomas - the complete, bolt-on HCR kit from Opt Offroad! See below for lead times.

THE PROBLEM: This kit addresses one of the biggest design flaws on our powertrain: the haphazard low-hanging radiator... It extends several inches down past the frame, sacrificing front end ground clearance and just waiting to get smacked.

We've heard many stories from fellow owners that were left stranded, waiting for a tow after relatively minor accidents on the trails and highways... all preventable. Whether an off-roader or not, and whether you have decent skids or not, it's simply not a risk worth taking.

THE SOLUTION: Opt Offroad's HCR kit replaces that vulnerable stock radiator with your choice of a Premium OE Replacement or High Performance unit that mounts above your frame rails, where it should have been from the start! All kit options are a complete bolt-on replacement and easy install process. They also all come from manufacturers with a proven track record and warranties to back it.

Note- the hose included in this kit is spec’d for 3.4L V6 trucks, but the HCR kit will also work for the 2.7L 3RZFE too. You will simply need to source a lower hose for a manual transmission truck.

Want a complete high clearance skid plate and radiator solution? TAP HERE

PREMIUM OE PACKAGE: $195; lead time ~1 week.

With an aluminum core and plastic housing, the CSF unit is the best balance between performance and budget. This is a great option for anyone that is satisfied with their current cooling performance and simply wants a high clearance, premium replacement. CSF's reputation is exceptional, and we know many people who have been running their radiators for 10+ years with nothing but good feedback.

(2) Stainless Steel Hose Clamps (Worm Gear)
(1) Custom Lower Radiator Hose (Pre-Formed)
(1) CSF Premium OE Replacement Radiator:
- Precision Molded Plastic Housing w/ Aluminum 1 Row Core
- Factory Bolt-On Design, with Trans Cooler Fittings
- 23 7/8" H X 28 1/8" W, Rated for Factory Power
- Cap included, we'll ship with hose & clamps

HIGH PERFORMANCE PACKAGE: $295; BACKORDERED, lead time 4-8 weeks.

With a full aluminum construction and deeper body, this Champion unit dramatically improves your cooling performance due to increased fluid capacity and heat dissipation efficiency. And with a rating up to 550 horsepower, it can handle anything our 5VZ pigs can throw at it!

(2) Stainless Steel Hose Clamps (Worm Gear)
(1) Custom Lower Radiator Hose (Pre-Formed)
(1) Champion Cooling Systems High Performance Radiator:
- TIG Welded 2mm Thick Aircraft Aluminum, 3 Row Core
- Factory Bolt-On Design, with Trans Cooler Fittings
- 23 1/2" H X 28 1/8" W, Rated Up To 550 HP
- 14-16 Fins per Inch, 3/8" Tube Spacing
- Billet Fill Neck w/ 16lb Cap Included

INSTALL HELP: Watch this YouTube video for tips: TAP HERE

IMPORTANT NOTES:

Coolant-

CSF recommends following factory specifications.
Champion recommends Ethylene-based yellow/green coolant & distilled water only, to prevent premature wear on your radiator. Peak 10X is a great choice, as it is formulated to work with all vehicles and cooling systems, and has been thoroughly tested to work with these all-aluminum radiators. Using other coolant types can potentially affect your warranty with Champion. While "Asian Red" and "Toyota Pink" coolants are Ethylene-based, they have been known to cause issues with the full aluminum housings, and are discouraged for this setup.

Fan Shroud- Your factory shroud is reusable for this kit! However, there will be excess length at the bottom. It can be easily trimmed off with a razor blade to match the height of the new radiator, if you prefer. Champion is working on a plug and play option for us.

Maintenance- Overheating issues can be caused by a number of factors (dirty fluid, broken water pump, fan clutch, thermostat...) so don't expect a nice new radiator to fix your problem if something else is neglected. We are not responsible for overheating issues on your truck. Your cooling system is just that, a system. So treat it as such and maintain it!

3rd Gen 4Runner Radiators

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High Clearance Radiator Conversion (HCR) - 3.4L V6