Description
The Flex Technologies CAC40P-400X6 is a 4-ply polyester-reinforced silicone charge air cooler boot designed for cold side (post-intercooler) applications on heavy-duty diesel engines. With a 4″ inside diameter and 6″ length, this hose provides a flexible, durable connection between the charge air cooler and intake manifold. Engineered to meet Mil-Spec A-A-52426 and OEM heavy-duty vehicle requirements, it’s built to withstand the demands of commercial trucking and off-highway applications.
Signs You Need a New Charge Air Cooler Boot
- Visible cracks, splits, or holes in the hose
- Boost pressure leaks causing reduced power and increased fuel consumption
- Soft or collapsed hose under boost pressure
- Oil-soaked or deteriorated hose material
Specifications
| Manufacturer | Flex Technologies |
|---|---|
| Part Number | CAC40P-400X6 |
| Part Type | Cold Side Charge Air Cooler Boot |
| Inside Diameter | 4″ |
| Length | 6″ |
| Wall Thickness | 0.16″ |
| Material | Silicone, 4-Ply Polyester Reinforced |
| Color | Blue |
| Temperature Range | -65°F to +350°F |
| Standards | Mil-Spec A-A-52426 |
Additional Sizes
Hot Side (Aramid/Orange):
- CAC40-300X6 – 3″ x 6″
- CAC40-350X6 – 3.5″ x 6″
- CAC40-400X6 – 4″ x 6″
- CAC40-400X8 – 4″ x 8″
- CAC40-450X6 – 4.5″ x 6″
Cold Side (Polyester/Blue):
- CAC40P-300X6 – 3″ x 6″
- CAC40P-350X6 – 3.5″ x 6″
- CAC40P-400X8 – 4″ x 8″
- CAC40P-450X6 – 4.5″ x 6″
Applications
This charge air cooler boot fits a variety of heavy-duty diesel applications including:
- Freightliner, Kenworth, Peterbilt, Volvo, Mack, International, and Western Star trucks
- School buses and transit buses
- Agricultural and construction equipment
- Marine and industrial diesel engines
Measure existing hose diameter and length to confirm fitment before ordering. Use T-bolt clamps rated for charge air cooler applications.
