If you’re swapping an LS engine into a G-Body and need reliable cooling, these radiators with dual fans offer strong cooling performance, easy installation, and compatibility with common LS water outlets. This guide highlights options for different G-Body years and configurations, focusing on models best suited for daily driving, street performance, and track readiness. The buyers here are looking for aluminum construction, robust cooling, and straightforward fitting. Below, compare five top picks with clear pros and usable caveats.
| Product | Best For |
|---|---|
| Cold Case GMG544-5K | 1978-1988 G-Body with LS swap |
| Universal LS Double Pass Radiator Kit | Custom LS swap builds and easy fan pairing |
| Cold Case 68-72 A-Body LS Swap Radiator | Early A-Body with LS engine |
| Cold Case 78-88 GM G-Body Radiator Kit AT | Late G-Body with dual 12″ fans |
| Griffin CrossFlow ComboUnit LS Swap | Multiple classic GM platforms needing durable crossflow |
Note: Each product below uses aluminum construction and dual fans in some configuration. Verify fitment with your exact radiator core width and mounting provisions before purchasing.
Cold Case GMG544-5K G-Body Radiator Kit
Key features include 100 percent TIG welded aluminum construction and corrugated fins to increase surface area for better thermal transfer. The dual 12-inch fans complement the radiator to improve air flow at low and high engine loads.
Best for: G-Body owners doing a complete LS swap who want a ready-to-install, all-aluminum solution with strong cooling performance. This kit emphasizes lightweight construction and robust thermal management for daily driving and weekend racing.
Caution: As with any aftermarket core, ensure mounting clearance relative to the radiator support and fan shroud for a proper fit.
Universal LS Double Pass Radiator Kit
Features include a 31″ radiator with two ends compatible with the water pump outlet and radiator upper inlet, plus a hose adapter for LS engines. The double-pass design lowers coolant temperatures by an estimated 10-20 degrees, aided by a 2.25” core with two rows of 1” aluminum tubes—faster heat rejection than conventional copper tubes.
Best for: Build projects requiring flexible fitment and notable heat reduction, suitable for street-driven LS swaps or moderate performance setups.
Caution: Double-pass designs may require precise hose routing; confirm inlet/outlet alignment for your specific LS engine configuration.
Cold Case 68-72 A-Body LS Swap Radiator
This model emphasizes 100 percent TIG welded, all-aluminum construction with corrugated fins for increased surface area and thermal transfer. It is pressure tested for added reliability during high-load driving and LS swaps.
Best for: Early A-Body platforms converting to LS power, seeking a compact, lightweight aluminum radiator with robust transfer characteristics.
Caution: Ensure compatibility with your car’s mounting points and shroud layout, as fitment can vary by year and trim.
Cold Case 78-88 GM G-Body Radiator Kit AT
With 100 percent TIG welded aluminum and corrugated fins for higher thermal transfer, this dual fan kit is designed for G-Bodies in the 1978-1988 range. The kit emphasizes robust cooling for LS-powered street cars and weekend warriors alike.
Best for: G-Body owners needing strong aluminum cooling and a dual-fan approach to handle moderate track use or hot-weather driving.
Caution: Cooling performance depends on fan sizing and shroud compatibility; verify space around the core for optimal airflow.
Griffin CrossFlow LS ComboUnit Radiator
Griffin’s ComboUnit features a crossflow design with a built-in dual fan kit. Core size is 28 x 19 x 2.68 inches; overall size is 33.25 x 18.62 x 6.42 inches, making it a good fit for many LS swap configurations across classic GM platforms.
Best for: Multi-application use where a proven crossflow design with integrated fans is desirable for reliability and straightforward installation.
Caution: Crossflow radiators may require precise mounting in tighter engine bays; verify available space and mounting hardware before purchase.
Buying Guide: Key Considerations For G-Body LS Swap Radiators With Fans
- Cooling performance: Look for dual fans and a high-efficiency core (aluminum with corrugated fins) to maximize heat rejection, especially in hot climates or track sessions.
- Fitment: Confirm core width, overall dimensions, inlet/outlet positions, and compatibility with your G-Body year and LS engine configuration. Some models suit 1978-1988 G-Body better than others.
- Construction quality: All-aluminum TIG welded radiators with pressure testing offer durability and reliable performance over years of operation.
- Fan integration: Decide between fans included in the kit or adapter-ready options. Ensure shroud compatibility to optimize airflow.
- Ease of installation: Some kits include hoses and adapters; others require custom fittings. Consider your shop’s capabilities and tool availability.
- Maintenance and service: Aluminum radiators generally require less corrosion treatment and are lighter, but check availability of replacement parts and mounting hardware.
- Driving use: Choose based on daily driving, street performance, or occasional track work. More aggressive cooling setups may benefit from larger cores and higher fan output.
Frequently Asked Questions
- What is the advantage of a dual fan setup for an LS swap?
Dual fans provide improved cooling at low vehicle speeds and high engine loads, reducing overheating risk during acceleration or hot-weather driving. - How do I know if a radiator will fit my G-Body with an LS swap?
Check core width, overall width, inlet/outlet positions, and mounting points. Compare to your radiator support, shroud, and hoses. - Are all-aluminum radiators better than copper?
Aluminum radiators are lighter and dissipate heat efficiently with modern fins, though copper can offer excellent thermal conductivity; weight and fitment are often deciding factors. - Do I need a separate condenser for an LS swap with factory AC?
Some LS swap kits are designed to accommodate factory AC; verify compatibility with your vehicle’s air conditioning components and mounting arrangements. - Can I install these radiators without professional help?
Basic engine bay work and hose routing can be DIY for experienced enthusiasts; more complex mounting or coolant routing may require professional assistance. - What maintenance is required for aluminum radiators?
Periodic coolant flushes, inspection of hose connections, and fan operation checks help maintain performance and prevent leaks.