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Proform 69580-21 - Slim-Fit Radiator; Universal; Gm; 21" Core; Manual Trans

Inlet on Driver Side, Outlet on Passenger Side21" Core; Single Pass; Manual Transmission

­• Radiator & Shroud Less Than 4" Thick
­• Integrated Radiator/Shroud/Fan System
­• Adjustable Thermostat
­• 100% Fabricated Aluminum Tanks
­• Hybrid Extruded Tube Core Technology
­• Billet Aluminum Filler Neck
­• High-Capacity Overflow Tube
­• Patented Innovation and Design
Pricing: $749.95

Free U.S. Continental Shipping


The basic concept of automotive radiators hasn't changed in more than 100 years! And fans have been hung onto them in a mish-mash of ways for just as long. Since then, aside from materials and design improvements, NOTHING HAS CHANGED...UNTIL NOW!

PROFORM is upending the radiator industry with the introduction of its new Slim-Fit Radiator System! No more cobbling together a core, a fan, possibly a shroud, and gobbling up 8" of valuable front-to-back under-hood space, sometimes leading to clearance problems.


PROFORM has completely rethought how the radiator, fan, thermostat, and shroud can come together seamlessly to create a unified radiator system that is under 4" thick, looks and works great, and is pre-assembled right out-of-the-box, ready for a custom fit into your American V8 muscle car! A hodge-podge of one hundred years of rigged-up cooling paraphernalia has come to an end.


What did we do? With revolutionary engineering we flipped the motor around so instead of hanging on the outside, it's integrated directly into a uniquely designed core made with state-of-the-art brazing technology (with no meaningful cooling compromise). The core itself is a hybrid combination of traditional dual 1" tubes, and full core width extruded tubes. Combine this with a high-performance fan blade inserted into a smooth aluminum shroud, the result is the industry's thinnest, most streamlined look. Every PROFORM Slim-Fit Radiator includes a shroud, electric fan with adjustable thermostat, wiring harness, and radiator cap.

Cap Color Silver
Cap Included Yes
Core Height (in) 17"
Core Thickness (in) 2.4"
Core Width (in) 21"
Electric Fan Included Yes
Fan CFM 2100
Finish Natural
Height (in) 18.5"
Inlet Diameter (in) 1.5"
Inlet Location Driver Side
Max Recommended Horsepower 600
Mounting Style Universal
Outlet Diameter (in) 1.75"
Outlet Location Passenger Side
Overall Width (in) 25.4"
Part Type Radiator
Series Slim-fit
Shroud Included Yes
Transmission Type Manual
Voltage Compatibility 12Volts

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • 69580-21
  • 69580-21
  • Proform
  • New

Shipping Information

  • Item Requires Shipping
  • 27.3 lbs.
  • W8.0000” x H22.3000” x L31.5000”
  • Free U.S. Continental Shipping

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