The 1-2-3 Series is Proform's modular way to build a cooling system: start with the radiator, bolt on a matching shroud or fan bracket, then add the fans. This 21 in. core GM-style radiator is the Stage 1 piece, with tig-welded aluminum tanks, a dual 1 in. tube single-pass core with optimized louvers, and deep draw headers for a solid tube-to-header seal. The Four-Corner mounting design lines up with every 1-2-3 Series shroud and bracket, so the rest of the system bolts straight on.

Proform 121G000 1-2-3 Series Radiator Features:

• Universal GM-Style radiator for manual transmission applications
• 21 in. core width, 2.400 in. core thickness
• 26.300 in. overall width
• 1.500 in. inlet and 1.750 in. outlet
• Dual 1 in. tube, single-pass core with optimized louver design
• Deep draw headers for a solid tube-to-header seal
• Tig-welded aluminum tanks in a natural finish
• Four-Corner design accepts 1-2-3 Series shrouds and fan brackets