Tri-Flo 4-core Aluminum Early Bronco Radiator - SBF V8

66-77 Ford Bronco

Condition: New
Part Number: 6369
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Price: $399.00

TOMS OFFROAD 4-core Tri-Flo Triple Pass Aluminum Heavy Duty Radiator for 66-77 Ford Broncos. This radiator has 4 rows of cooling tubes rather than the 3 rows found in a factory early Bronco radiator. This TOMS OFFROAD exclusive performance aluminum radiator for the first generation Ford Bronco features a triple pass system that creates a longer path for coolant to flow through the radiator. This system allows for the coolant to come in contact with much more surface area of the radiator, which results in greatly improved cooling efficiency. This heavy duty aluminum radiator features a built in automatic transmission cooler which may be used for automatic transmission setups or left plugged when running a manual transmission or separate transmission cooler. This performance early Bronco aluminum radiator will cool the most stubborn of heating problems.

TOMS OFFROAD Tri-FLo Performance Early Bronco Aluminum Radiator
  • Four core, triple pass design offers optimum engine cooling.
  • Installation requires 4-core mounting brackets and bushings.
  • Developed exclusively for TOMS OFFROAD
  • High quality construction
  • Integrated transmission cooler


Fitment: 1966 Ford Bronco, 1967 Ford Bronco, 1968 Ford Bronco, 1969 Ford Bronco, 1970 Ford Bronco, 1971 Ford Bronco, 1972 Ford Bronco, 1973 Ford Bronco, 1974 Ford Bronco, 1975 Ford Bronco, 1976 Ford Bronco, 1977 Ford Bronco

  • Recommended for use with TOMS OFFROAD high performance aluminum water pump.
  • WaterWetter by Red Line Oil is recommended at time of install and every 15,000 miles for best performance.
  • Installation requires 4-core mounting brackets and bushings.
  • Built-in automatic transmission cooler. For use with manual transmissions, leave the cooler ports plugged. Transmission cooler ports use factory cooler line adapters (#6353)
  • Designed for standard flow early Bronco setups. Not recommended for reverse flow pump setups.
  • 1/2 inch fan spacer (#6446A) recommended. Minimum 1 inch of space between the fan and the radiator is recommended to avoid damge.
  • If you have power steering box that mounts to the inside of the frame, most radiators (including this one) will require modification to fit. This type of steering box is not factory. The factory gear box mounts to the outside of the frame and clearance is not an issue.

How to select a radiator for your early Bronco
Keep in mind when choosing a radiator, there are a few key factors to consider such as size of engine, stock, mild or high performance. What you do with the Bronco and how harsh the climate is you drive in. A bone stock Bronco can be fine with the standard copper core radiator whereas the pumped up or oversized motor in the extreme condition will require the largest aluminum cored radiator. Whatever your application, we have a radiator that will keep you cool. If you need help choosing a radiator, call our staff and we will gladly help you choose the radiator for your Bronco. And most important, don't forget the shroud.

Average Customer Rating: star star star star star (2 customer reviews)

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Review by: Gregory, May 16, 2021   star star star star star

WOW, After 2 decades this radiator has finally dropped my temps down almost 20 degrees across the board. 95 to 100 degree weather on the interstate and off roading stayed at 190 or lower this last week. Much better than the old 4 cord brass radiator. Thanks Tom’s

Review by: Team Roaming Wolves, Aug 5, 2022   star star star star star

Besides normal day-to-day driving, this amazing radiator has gotten us through two Rebelle Rally competitions to date. Each rally we drive over 1500 miles throughout the California and Nevada mountains and deserts, all the way down to the USA-Mexico border. We drive all day, on and off-road, covering all terrain and elevations, reaching extreme external temperatures, even frequenting Death Valley, all at the end of summer, and we have never once overheated. Our Bronco temps remain low the entire time, which is more than we can say for ourselves!

Prop. 65 Warning for California Residents

WARNING: This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. Learn more