2007-2018 Jeep Wrangler JK HEMI Conversion 4 Row 5MM Fin Extruded Tube Aluminum Radiator

Jeep Wrangler 2007-2018 JK HEMI Conversion OVERVIEW A HEMI-swapped JK puts serious thermal demand on the cooling system. Stock units weren’t engineered for it — and most aftermarket radiators simply don’t address the root cause of field failures: tube integrity under sustained heat and pressure. The Fluidyne JK HEMI Conversion Radiator is built around two engineering decisions that change the durability equation: extruded aluminum tubes and a 5mm high-density fin pitch. Together they maximize heat rejection while eliminating the leak points that conventional tube construction inherently creates. KEY DIFFERENTIATORS Extruded Aluminum Tubes Formed as a single continuous extrusion — no seams, no joints along the tube wall. This is the primary leak point in conventional radiator construction, and it doesn’t exist here. 5mm Fin Pitch Tighter fin spacing increases surface area in contact with airflow, accelerating heat transfer per square inch of core. More cooling capacity within the same envelope as stock. True Direct Fit Accommodates the stock JK radiator fan, A/C condenser, and transmission cooler. No fabrication, no adapter brackets — bolts in where the stock unit came out. Full Aluminum Construction Tanks, core, and extruded tubes are all aluminum — minimizing corrosion potential and keeping weight down on a build that’s already carrying a heavier engine. WHY TUBE CONSTRUCTION MATTERS Most radiator failures in high-output HEMI swaps aren’t caused by the fins or tanks — they’re caused by the tubes. Conventional tube construction creates stress points along every joint. Under the thermal cycling of a HEMI application (high idle temperatures, aggressive towing loads, trail heat), those stress points are where cracks initiate. Fluidyne’s extruded tubes have no longitudinal seam. The tube is the extrusion. There is no joint to fail. FEATURES Extruded aluminum tubes — seamless wall construction, no joints along tube length 5mm fin pitch for maximized core surface area and heat transfer Increased core volume and coolant capacity over stock JK radiator Dual-pass coolant flow — extends dwell time in the core for more effective heat extraction TIG-welded tank-to-core interface Compatible with stock JK fan, A/C condenser, and transmission cooler Includes high-pressure radiator cap and magnetic drain plug Direct fit — no modification required for 2007–2018 Wrangler JK HEMI conversion