Drop-in replacement for John Deere RE231509 Charge Air Cooler ALUMINUM BRAZED CORE WITH HEAVY CAST TANK CONSTRUCTION HEAVY WALL TUBES, ENHANCED FINS FOR SUPERIOR COOLING Core dimensions (heat exchange area) is 35.6" x 19.2" x 4" deep 12 month "money back guarantee" part warranty - If the part is defective, we will either replace your part for free, or refund your money WE BACK-UP WHAT WE SELL