LS Radiator for 1970-1981 Pontiac Firebird Automatic Transmission
The 1970-1981 Firebird Radiator (AutoTrans) is the ideal LS cooling solution for F Body Firebird restorations using automatic transmissions. Each TIG welded aluminum core and tank delivers reliable heat dissipation under spirited street driving and extended highway runs. Designed for direct installation in Pontiac Firebird frames from 1970 to 1981, it aligns with factory mounting points, includes complete hardware, and preserves chassis geometry. Precision coolant passages and a dense fin layout maintain stable temperatures and resist corrosion through years of service.
Precision TIG welded aluminum structure
The 1970 to 1981 Firebird Radiator (AutoTrans) employs TIG welded tanks and core crafted entirely from high quality aluminum. TIG welding creates uniform bead profiles and minimal heat distortion, preserving the exact coolant passages needed for an LS engine swap in an F Body Firebird. This seamless construction resists leaks under continuous thermal cycles and maintains rigidity even when subjected to vibration and road shock. By using a monolithic aluminum design, the assembly remains light, supporting throttle response and preventing undue stress on factory mounting points. Each weld joint undergoes inspection to ensure pressure integrity and long term reliability.
Optimized fin and tube arrangement for stable coolant flow
A dense network of aluminum fins paired with precision sized coolant tubes maximizes heat transfer from engine coolant to ambient air. The balanced fin density and core thickness allow factory fans to work efficiently without adding parasitic drag on the engine. Carefully engineered passage dimensions ensure uniform flow, preventing hotspots that could develop around cylinder heads or block exits under sustained load. This configuration quickly dissipates heat spikes typical of spirited street driving or extended highway runs. Drivers gain consistent temperature control that protects LS performance and enhances engine longevity.
Corrosion resistance using bare aluminum or black epoxy finish
Natural aluminum forms a self healing oxide layer that provides robust resistance against pitting and corrosion in humid or harsh road environments. For those seeking extra protection, an optional black epoxy finish is applied under factory conditions to deliver a durable barrier against chemicals, debris, and moisture. Both finish options are applied with precision to ensure uniform coverage and ease of maintenance in garage or track settings. The choice between classic bare aluminum or a styled coating allows owners to match their aesthetic preference while securing the radiator's structural integrity over many seasons.
Direct bolt in fit for 1970 to 1981 Firebird frames
This radiator is engineered to install directly into 1970 to 1981 Pontiac Firebird frames equipped with automatic transmissions, aligning perfectly with original mounting points. Hose connections and bracket locations mirror factory dimensions, removing the need for custom adapters or drilling. A complete hardware kit accompanies the radiator, providing clear instructions to guide home mechanics and professional shops through each installation step. By preserving factory chassis geometry, coolant lines align precisely and brackets support the radiator without added stress. The direct fit design streamlines installation time and ensures seamless integration with the stock fan shroud and overflow reservoir.
Count on consistent cooling performance for your LS swap. To complete your same radiator but with fans, see our 1970-1981 Firebird Radiator (Automatic Transmission) with Fans.