Shop Peterbilt 357 & 378 CAC Clamps, Boots & Hoses

Peterbilt 357/378 CAC Clamps, Boots & Hoses

The Peterbilt 357/378 CAC Clamps, Boots & Hoses product lineup includes a wide range of essential parts and accessories for Peterbilt semi-trucks. This product lineup features high-quality silicone hoses, heavy-duty T-bolt clamps, and other replacement components to keep the charge air cooling (CAC) system on your Peterbilt running at peak performance. Key products in this product lineup include premium-grade blue, gray, and red silicone hump hoses in various sizes to fit your 357 or 378 model, as well as a selection of stainless steel and heavy-duty T-bolt clamps to securely connect those hoses. You'll also find flexible coolant hoses, 90-degree elbows, and other cooling system parts to ensure proper airflow and temperature control. Whether you need to replace worn-out CAC components or want to upgrade the cooling system on your Peterbilt, this product lineup has the high-quality parts and accessories to get the job done right. With a focus on durability, performance, and easy installation, these Peterbilt-specific products are designed to help keep your truck running strong for the long haul.

Frequently Asked Questions About Peterbilt 357/378 CAC Clamps, Boots & Hoses

What years and engine models do these CAC components fit?

Our CAC clamps, boots, and hoses are designed for Peterbilt 357 and 378 models primarily from 1987-2007. They're compatible with Caterpillar C12, C13, C15, and 3406E engines, as well as Cummins ISX and N14 engines. Always verify your specific engine model and turbo configuration before ordering, as some aftermarket modifications may require different sizing.

What's the difference between silicone and rubber CAC boots, and which should I choose?

Silicone boots handle temperatures up to 500?F and last 3-5 times longer than standard rubber boots, making them ideal for heavy-duty applications or frequent haulers. Rubber boots work well for moderate use and cost less upfront but typically need replacement every 2-3 years. If you're experiencing frequent boot failures or run high boost pressures, silicone is worth the investment.

How do I know what size CAC clamps I need?

CAC clamp sizing depends on your hose diameter. Most Peterbilt 357/378 models use 3.5" to 4" clamps for the main charge air connections. Measure the outside diameter of your CAC pipe or the inside diameter of your boot where the clamp sits. T-bolt clamps provide more clamping force than standard worm-gear clamps and are recommended for boost pressures over 30 PSI.

Can I install these CAC components myself, or do I need special tools?

Installation is straightforward with basic hand tools - you'll need screwdrivers or a socket set for clamps and possibly pliers for stubborn boots. Apply a thin layer of dish soap to boot ends for easier installation. Most jobs take 30-60 minutes. The trickiest part is accessing the lower CAC connections near the intercooler, which may require removing the bumper on some models.

How often should CAC boots and hoses be replaced?

Inspect CAC components every 6 months or 50,000 miles. Look for soft spots, bulging, cracking, or oil saturation. Even without visible damage, rubber boots should be replaced every 3-4 years as preventive maintenance. Hoses typically last 5-7 years. If you're experiencing boost leaks, loss of power, or increased turbo lag, check these components first - they're often the culprit.