Hayden Automotive 676 Custom-Add-On Rapid-Cool Transmission Cooler – 11.0 in x 5.875 in x 0.70 in (Not for Direct Replacement)

Upgrade your vehicle's cooling with the Hayden Automotive 676 Custom-Add-On Rapid-Cool Transmission Cooler. This premium, plate-and-fin design sits compactly in the engine bay, delivering a practical balance of size and performance. The kit uses durable steel construction and a patented internal turbulation flow path that increases heat transfer while maintaining a low pressure drop, helping your transmission breathe under demanding conditions.

The kit is designed as a custom add-on rather than a direct replacement, making it suitable for sub-compact to compact cars with GVWR up to 18,000 pounds. Its compact footprint (11.0 inches long, 5.875 inches wide, 0.70 inches tall) slips into crowded engine bays, while the 19 mm hose barb fittings ensure a secure connection to standard hose sizes. Pre-drilled mounting brackets simplify alignment and installation, so you can place this cooler where it fits best on your vehicle.

What you get goes beyond the cooler itself. Each rapid-cool kit includes the cooler, hoses, mounting hardware, and everything you need to complete the install. The rugged plate-and-fin design actively moves heat away from transmission fluid, helping to keep temperatures reasonable during tough pulls, hot weather, or extended highway cruising. The flow-path design is engineered to optimize heat exchange while minimizing pressure loss, so the rest of your cooling system doesn't have to work harder than necessary.

Real-world uses and benefits

• Compact footprint for tight engine bays, with a focused cooling area for the transmission cooler.
• Solid steel construction provides durability under road dust, vibration, and heat exposure.
• Patented turbulation boosts heat transfer for more efficient cooling without aggressive pressure changes.
• Easy installation with pre-drilled brackets; includes mounting hardware for a clean, secure fit.

• Versatile compatibility: suitable for a range of sub-compact to compact vehicles with GVWR up to 18k lbs.
• Ready-to-install package with hoses and fittings, designed to cut install time.
• Not intended as a direct replacement; intended to supplement your existing cooling system.

Note: This is a custom-add-on application intended to work with compatible setups. Always verify fitment for your specific vehicle and consult a professional if needed.