Find aftermarket Peterbilt 330/335/337 Charge Air Coolers to keep your CAC running efficiently for years to come. Investing your hard-earned money in a quality charge air cooler for your rig can boost its long-haul durability, save on fuel economy, maintain a consistent engine output, and prevent costly downtime from too much heat to the engine. Not only can you save money, you can preserve the resale value of your classic 330, 335, or 337 model Peterbilt truck.