PDI Big Boss Charge Air Cooler - Peterbilt 377, 378, 379 CAC (1994-2006)

The PDI Big Boss Charge Air Cooler – Peterbilt 377, 378, 379 (1994–2006) is a premium, high-efficiency intercooler engineered to improve airflow, reduce intake temperatures, and enhance engine performance for classic Peterbilt models. Designed to outperform OEM coolers, it provides superior cooling capacity, optimized combustion, and better turbocharger efficiency for long-term reliability and performance.

Built with a heavy-duty bar-and-plate aluminum core, the Big Boss Charge Air Cooler ensures maximum heat dissipation and durability under extreme boost and vibration conditions. Its precision-welded construction and leak-resistant design help maintain consistent airflow and lower exhaust gas temperatures—extending turbo and engine life.

Perfect for both performance upgrades and OEM replacements, the PDI Big Boss Charge Air Cooler – Peterbilt 377, 378, 379 (1994–2006) delivers unmatched cooling efficiency, improved fuel economy, and lasting dependability for professional drivers and fleets.