Peterbilt 567/579 CAC Clamps, Boots & Hoses: Engine Efficiency This product line offers durable silicone and EPDM hoses, t-bolt clamps, and connectors for charge air coolers and coolant systems in Peterbilt 567/579 models. With options like 4-ply hump hoses, 90-degree elbows, and multi-purpose coolant hoses, these parts ensure optimal engine performance, temperature control, and leak prevention. Perfect for replacements or upgrades.