Mishimoto Radiator X Line Aluminum 1955-1959 GM 3100

The Mishimoto Radiator X Line Aluminum 1955-1959 GM 3100 replaces the factory unit to provide improved cooling efficiency and enhanced reliability for GM 3100 Series trucks.

This X-Line Performance aluminum radiator from Mishimoto is engineered as a direct upgrade to the brittle stock radiator used in 1955–1959 GM 3100 Series trucks. It focuses on durable construction and more effective heat rejection to reduce operating temperatures and help preserve engine components under typical driving and towing loads.

• Aluminum construction — Provides corrosion-resistant, lightweight thermal mass compared with aged factory cores, contributing to longer service life and more consistent heat transfer.
• X-Line Performance design — Purpose-built for upgraded cooling capacity and durability; designed to address common failure modes of the original equipment radiator.
• Improved cooling efficiency — Delivers better heat dissipation to help lower coolant temperatures and maintain stable engine operating conditions.
• Enhanced reliability — Intended as a robust replacement for brittle stock radiators, reducing the likelihood of leaks and failures associated with aged OEM units.
• Vehicle-specific fitment — Manufactured for the 1955–1959 GM 3100 Series truck application to ensure correct mounting, hose alignment, and integration with existing engine bay components.

Branded and supported by Mishimoto, this radiator targets owners seeking a functional, long-lasting cooling upgrade that restores dependable thermal management without altering the vehicle’s original layout.