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Peterbilt 367 CAC Clamps, Boots & Hoses

Shop for Complete Charge Air Cooler Refresh Kits

If your Peterbilt 367 isn’t holding boost or feels sluggish under load, start with the CAC system. CAC clamps, boots, and hoses carry cooled, pressurized air from the turbo to the engine. When they seal tight, your truck makes power efficiently. When they leak, performance and fuel economy drop fast. A failing CAC boot or loose clamp bleeds boost. You feel it on hills and during acceleration. The engine burns more fuel to compensate, which creates excess soot. That soot loads the DPF quicker and increases the risk of a derate. For a working 367, that downtime costs money. Oil contamination is a common problem. Turbo oil mist slowly breaks down silicone boots. They soften. They swell. Then they rupture under pressure. Replacing oil-soaked boots early helps prevent blown hoses and roadside breakdowns. Clamps are just as important as the boots and hoses. Weak or stretched clamps let hoses shift under boost. That causes leaks and can pull dirty air into the intake. Unfiltered air carries grit, and grit inside the engine leads to permanent damage. Heavy-duty CAC clamps keep connections tight and protect the engine.

Signs You Need a Replacement

You may hear a hiss or whistle when boosting. You may see oil residue or black smoke under throttle. You may notice lower boost readings on the dash. Replacing CAC clamps, boots, and hoses is a smart preventative repair. A short shop install beats sitting on the shoulder waiting for a tow
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    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTFIT TRUCK PARTS

    $32.24
    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose* High Quality Silicone Coolant Hose* 2.5 Inch To 2 inch Diameter* 6 Inches Long* Can Be Used For CAC Hose* Temp Range -65F To +500F* Sold...
    09-070126
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    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTFIT TRUCK PARTS

    Now: $45.76
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    BESTfit Charge Air Cooler Hose* High Quality Charge Air Cooler Hose* 3.75 Inch ID x 3 Foot* Sold Individually* Warranty On Charge Air Cooler Hoses Against Defects In Workmanship & Material From Date...
    09-070121
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    09-070121
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    BESTfit 3 ID X 6 Inch 4 Ply Nomex Hot Side Coupler Hump Hose

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    $38.57
    BESTfit High Temperature Coupler HoseThis silicone 4 ply and 6 inch long hump hose is made of a flexible silicone rubber shaped like a hump or a wave. It is used to connect two 3 inch ID pipes or...
    09-070106
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Shop for Complete Charge Air Cooler Refresh Kits

If your Peterbilt 367 isn’t holding boost or feels sluggish under load, start with the CAC system. CAC clamps, boots, and hoses carry cooled, pressurized air from the turbo to the engine. When they seal tight, your truck makes power efficiently. When they leak, performance and fuel economy drop fast. A failing CAC boot or loose clamp bleeds boost. You feel it on hills and during acceleration. The engine burns more fuel to compensate, which creates excess soot. That soot loads the DPF quicker and increases the risk of a derate. For a working 367, that downtime costs money. Oil contamination is a common problem. Turbo oil mist slowly breaks down silicone boots. They soften. They swell. Then they rupture under pressure. Replacing oil-soaked boots early helps prevent blown hoses and roadside breakdowns. Clamps are just as important as the boots and hoses. Weak or stretched clamps let hoses shift under boost. That causes leaks and can pull dirty air into the intake. Unfiltered air carries grit, and grit inside the engine leads to permanent damage. Heavy-duty CAC clamps keep connections tight and protect the engine.

Signs You Need a Replacement

You may hear a hiss or whistle when boosting. You may see oil residue or black smoke under throttle. You may notice lower boost readings on the dash. Replacing CAC clamps, boots, and hoses is a smart preventative repair. A short shop install beats sitting on the shoulder waiting for a tow.

Frequently Asked Questions About Peterbilt 367 CAC Clamps, Boots & Hoses

What does CAC stand for and what does this part do?

CAC stands for Charge Air Cooler, also known as the intercooler. The clamps, boots, and hoses in this category connect the turbocharger to the charge air cooler and then to the intake manifold, carrying pressurized, cooled air into the engine. A solid, leak-free connection here is essential for proper boost pressure and engine performance.

How do I know if my CAC boot or hose needs to be replaced?

Common signs of a failing CAC boot or hose include a noticeable loss of engine power, black smoke, a hissing or whistling sound from the engine bay, or a boost leak code on the dash. Physically inspect the boots for cracks, soft or brittle rubber, and check clamps for looseness or corrosion, especially around the connection points at the turbo, cooler, and intake.

Will these clamps, boots, and hoses fit my Peterbilt 367 regardless of engine option?

Peterbilt 367 trucks were built with different engine options over their production run, so hose and boot diameters, lengths, and routing can vary. Always check the listed specifications, including inside diameter and length, against your truck's engine and CAC system before ordering to ensure a proper fit.

What materials are these boots and hoses made from, and does it matter?

CAC boots and hoses are typically made from silicone or reinforced rubber compounds designed to handle heat, pressure, and engine bay vibration. Silicone components generally offer better resistance to heat cycling and cracking over time compared to standard rubber, which can be a worthwhile consideration for trucks that run long hours or in extreme climates.

Can I install a new CAC clamp, boot, or hose myself, or do I need a shop?

Many drivers and fleet techs replace these components themselves since the job mainly involves loosening the old clamps, removing the damaged boot or hose, and installing the new one with fresh clamps. That said, access can be tight depending on where the component sits on the 367, so if you are not comfortable working around the turbo and charge air cooler lines, having a qualified diesel shop handle it is a safe alternative.

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