Radiator Jeep Wrangler 87-04 YJ LS Swap

The FLUIDYNE PERFORMANCE Radiator for Jeep Wrangler 87-04 YJ LS Swap is a precision aluminum cooling solution engineered for Jeep YJ models running GM LS-series engine conversions. This polished aluminum radiator delivers single-pass cooling efficiency with driver-side inlet and passenger-side outlet configuration, directly addressing the thermal management demands that come with retrofitting a modern V8 into a classic Wrangler platform.

Engineered to OEM cooling capacity standards, the radiator measures 24.125 inches wide by 22 inches tall by 3 inches deep—dimensions optimized to fit within the YJ chassis while maintaining adequate core surface area for LS-series heat rejection. The all-aluminum construction resists corrosion in harsh off-road environments, while the polished finish delivers both durability and a clean engine bay aesthetic. The single-pass design minimizes coolant turbulence, promoting consistent flow rates that prevent hot spots common to LS swaps in compact Jeep platforms. At 16 pounds, the radiator integrates without adding excessive underhood weight to the YJ's suspension geometry.

This radiator is purpose-built for Jeep Wrangler YJ owners executing LS-series engine conversions—whether building a weekend trail rig, a rock-crawler, or a dual-purpose off-road and street vehicle. LS swap builds require carefully matched cooling components because modern V8s produce significantly higher heat output than the original 4-cylinder or inline-6 mills. The FLUIDYNE radiator addresses inlet/outlet port location, core capacity, and fitment constraints specific to the YJ generation, eliminating the guesswork of adapting truck or car radiators to Jeep specifications.

LS conversions have become the standard platform upgrade for vintage Jeeps, offering reliability, parts availability, and performance advantages over aging original powerplants. Selecting a radiator matched to your specific model year and engine platform is critical—the YJ chassis evolved across its 1987-2004 production run, and hose routing, fan shroud clearance, and core placement vary accordingly. FLUIDYNE's dedicated YJ LS radiator eliminates fitment compatibility issues and ensures your cooling system operates within design parameters during both street driving and sustained off-road use.