26in Wide Core LS Radiator for 1973-1976 Chevy Corvette Y-Body
Swapping an LS powerplant into a 1973 to 1976 Corvette Y-Body chassis can expose cooling weak spots and the 1973-1976 Corvette Radiator 26" Wide Core (Auto Trans) answers those demands with increased coolant capacity and dedicated transmission cooling passages. Its broad core sustains stable temperatures in stop and go driving as well as highway cruising by extending fluid residence time within the tubes. Aluminum construction delivers corrosion resistance without adding front end weight, preserving handling balance. Installation mounts directly to factory brackets on automatic models, eliminating trimming or shroud changes for a precise fit.
Expanded 26 Inch Core Accelerates Heat Transfer
This radiator's 26 inch wide core transforms coolant circulation by combining increased fluid volume with a larger fin array directly in the Y Body's air stream. A longer fluid path inside the tubes gives coolant more time to shed heat from the LS engine, keeping temperatures in check during city traffic and sustained freeway speeds. The uniform tube spacing and tall fin stacks create a consistent airflow pattern, preventing localized hot spots when the engine is pushed hard on winding roads. As a result, peak coolant readings remain stable across varying driving conditions and avoid heat soak that can degrade performance. This expanded heat rejection capacity is vital for modern LS powerplants in classic chassis designed for lighter thermal loads.
High Conductivity Aluminum Core for Lightweight Strength
This radiator uses premium aluminum alloy prized for its high thermal conductivity and resistance to corrosion. The core wall thickness is calibrated to provide structural rigidity under vibration and impact while eliminating unnecessary mass at the front end, preserving the Corvette's original steering dynamics. Precision welds join tubes and end tanks to ensure leak free operation under the most demanding driving cycles, from daily commuter use to track day sessions. Lightweight construction reduces front end weight without compromising durability, and the aluminum substrate naturally resists rust and pitting over time. Each unit undergoes strict inspection protocols to confirm material integrity and long lasting performance.
Bare Aluminum or Black Epoxy Coating Choices
Builders can select between a pure bare aluminum finish that maximizes direct metal to air contact or a black epoxy coating that provides a barrier against moisture and road contaminants. The untreated core allows unobstructed heat flow, making it ideal for those who require every degree of cooling efficiency in competitive or high load scenarios. Alternatively, the epoxy layer seals tubes and fins against salt spray, brake dust, and airborne grit to extend service life in coastal or winter environments. The coating is applied uniformly to avoid clogging passages and maintain consistent airflow characteristics. This choice gives owners the freedom to prioritize cooling output or durability based on their specific operating demands.
Direct Factory Bracket Mounting for Automatic Models
Designed specifically for automatic transmission Corvette models from 1973 to 1976, this radiator attaches directly to the stock Y Body frame brackets without the need for drilling or trimming. Accurate alignment with factory mounting points preserves sheet metal integrity and maintains original shroud placement for a clean installation. By using existing hardware, installers avoid fabrication steps and possible fitment errors, cutting total install time. The direct-fit design ensures that coolant and transmission passages align perfectly, reducing the risk of leaks or fluid restrictions. This straightforward upgrade path bridges classic styling with modern cooling capability while respecting the car’s heritage.
This radiator delivers dependable cooling performance and ensures stable engine temperatures under all driving conditions. For the same radiator but with fans see our 1973-1976 Corvette Radiator 26" Wide Core (Automatic Transmission) with Fans.