Volvo VNL Mack CAC Hose - Cold Side 3.37" 20550690 70396458

• 4-Ply Silicone Construction: Manufactured from premium, heat-resistant silicone reinforced with 4 layers of polyester fibers to easily withstand extreme turbo boost pressures on Volvo VNL and Mack engines without bursting.
• Integrated Steel Bands: Engineered with heavy-duty steel hoop rings built directly into the boot, which actively prevent the hose from swelling and blowing off under heavy engine loads.
• Vibration Flexion: Features intelligently designed convolutions that allow the hose to flex and absorb intense engine vibrations, preventing tears and protecting your fragile intercooler piping.
• Extreme Heat Rating: Fully rated to operate safely in extreme environments ranging from -80°F all the way up to 360°F, while aggressively resisting minor oil splash and petrochemical blow-by.
• Direct Factory Replacement: Delivers guaranteed performance and an exact fit as a seamless drop-in alternative to expensive dealership parts like Volvo 70396458 and Mack 20550690.

Restore lost boost pressure and eliminate severe power loss with this premium aftermarket Volvo VNL Mack CAC Hose distributed by FleetPro Parts & Tires. A cracked, swollen, or completely blown charge air cooler (CAC) boot instantly bleeds off your engine's turbo boost, resulting in terrible fuel economy, heavy black smoke, and immediate limp-mode conditions. Manufactured by Automann to strict Fleet Standard specifications, this heavy-duty silicone intake hose easily withstands extreme pneumatic pressures. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.

Restore Boost Pressure: The Volvo VNL Mack CAC Hose Advantage

This Volvo VNL Mack CAC Hose is engineered to survive the brutal vibrations and massive pressure spikes of commercial over-the-road hauling. Unlike cheap rubber boots that quickly degrade and burst, this premium cold-side hose is constructed from high-grade silicone heavily reinforced with 4-ply polyester fibers. It features integrated steel bands to drastically reduce swelling and increase hoop strength, alongside molded convolutions that allow for extreme flexion in high-vibration situations. Fully rated for extreme temperature applications ranging from -80°F to 360°F (-60°C to 180°C), it actively resists degradation from minor oil splash and petrochemical exposure.

At FleetPro Parts & Tires, we know that reliable intake plumbing is the key to maintaining peak engine efficiency. Designed specifically for the cold side of Volvo VNL and Mack charge air systems, this 3.375-inch ID by 6.375-inch long boot acts as a direct, cost-effective drop-in replacement for highly searched factory numbers like Volvo 70396458 and Mack 20550690. Upgrade your induction system today to ensure your turbo boost makes it securely into your intake manifold.

Vehicle Fitment & Compatibility

This heavy-duty aftermarket silicone charge air hose features an exact-fit design intended for the following commercial applications:

• Make/Model: Volvo VNL & VN Class 8 Heavy-Duty Platforms
• Make/Model: Mack Trucks
• Component Group: Engine Air Intake / Charge Air Cooler (CAC) Piping
• Mounting Location: Cold Side (Intercooler to Intake Manifold)

Direct Replacement & Cross-Reference Numbers:

This Automann aftermarket boot serves as a direct exact-fit replacement for the following part numbers:

• Volvo OEM: 70396458
• Mack OEM: 20550690, 45MD384M
• Automann Distributor #: 561.62690

Technical Specifications

• Component Type: Charge Air Cooler (CAC) Hose / Turbo Boot
• Material: Heavy-Duty Silicone with 4-Ply Polyester Reinforcement
• Inner Diameter (ID): 3.375 Inches (Both Sides)
• Centerline Length: 6.375 Inches
• Design Features: Convoluted with Steel Band Hoop Rings
• Temperature Rating: -80°F to 360°F
• Product Level: Fleet Standard Aftermarket
• Brand: Automann (Distributed by FleetPro Parts & Tires)