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1-2-3 Series Radiator System, Universal GM Fitment, for Manual Transmissions, 26 in. Core Width - Natural Finish
InfoVehicle Info Needed
PROFORMPART NUMBER: 778-126GS20

1-2-3 Series Radiator System, Universal GM Fitment, for Manual Transmissions, 26 in. Core Width - Natural Finish

$50999
2 left in stock
ShippingShips on Nov 16, 2026
Lowest PriceLowest Price Guarantee

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Universal
GM
1-2-3 Series Radiator System
  • Universal GM Fitment
  • For Manual Transmission Applications
  • 26 in. Core Width
  • 2.400 in. Core Thickness
  • Single-Pass
  • All-Aluminum Construction
  • Natural Finish

    126GS20 Features:

    • Includes (2) 12 in. electric cooling fans, (1) Aluminum fan shroud, (1) Billet aluminum radiator cap, and (1) Thread-in adjustable thermostat controller
    • Patented four-corner design with TIG-welded end tanks
    • Optimized louvers for maximum cooling performance
    • Deep draw headers form an extra solid seal between the tube and header
    • Billet aluminum filler neck with a high-capacity overflow tube
    • Pre-threaded bungs
    • The cooling fans flow 2,400 CFM
    • Supports up to 800 horsepower
    • 1.500 in. diameter left/driver side inlet
    • 1.750 in. diameter right/passenger side outlet
    • 31.100 in. overall core width

      • Drop-in High-Performance Cooling for Your Engine

      Proform 1-2-3 Series Radiator Systems eliminate the need to piece together your own "DIY" combination by joining a complete high-quality cooling solution right out of the box! A radiator, fan shroud, and electric fan are mated together seamlessly to deliver a professional appearance at an affordable price. Drive worry-free, knowing you've chosen the best in vehicle cooling!

    Part TypeCooling Fan Kit
    Product LineProform 1-2-3 Series Radiator Systems
    BrandPROFORM
    Package Height8.25
    Package Width22.25
    Package Length32.25
    Weight26.25 PG
    Part CategoryPerformance Parts
    Outlet Size1.75 in (44.5 mm)
    Fan Quantity2
    Wiring IncludedYes
    Radiator Cap IncludedYes
    Radiator MaterialAluminum
    Shroud MaterialAluminum
    QuantitySold as a kit
    Inlet LocationDriver side
    Inlet Size (In.)1.5
    Core Height18 in (457.2 mm)
    Core Thickness2.4 in (60.96 mm)
    Fan Diameter12 in (304.8 mm)
    Core Width26 in (660.4 mm)
    Row Quantity1
    Outlet LocationPassenger side
    Radiator FinishNatural
    Fan IncludedYes
    Transmission CoolerNo
    Maximum Fan Cfm2,400 cfm
    Shroud ColorNatural
    Radiator StyleCrossflow
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning