Flex Technologies CAC40-350X6 Hot Side Charge Air Boot | 3.5" ID x 6" | Aramid

Premium aftermarket hot-side charge air cooler boot from Flex Technologies, a US silicone hose manufacturer in Gardena, California. Aramid-reinforced silicone rated to 500 F for the turbo-to-cooler run, with stainless steel retention rings moulded in. Flex is ISO 9001:2015 and IATF 16949:2016 registered.

Signs You Need a New Charge Air Boot

• Boost leak with noticeable power loss and poor throttle response
• Audible whistle or chuff at the joint under load
• Boot blows off under high boost, often after the clamp relaxes
• Silicone gone soft or swollen from turbo seal oil seepage
• Cracking or ply separation at the clamp bead
• Check engine light for boost pressure deviation or turbo underboost

Specifications

Cross References

This part replaces or is equivalent to the following part numbers:

• Flex Technologies: CAC40350X6
• TruckPro: NFCAC40-350X6

Applications

This boot is a universal cut-to-fit charge air connector, sold by inner diameter and length rather than by truck model. It fits the hot-side run from the turbocharger compressor outlet to the charge air cooler inlet on Class 6-8 trucks, where air temperatures routinely reach 300-450 F under load.

Do not substitute a blue CAC40P polyester boot on the hot side - polyester tops out at 350 F and fails early there. Measure the pipe OD and the gap between pipes before ordering.

Returns
All Pro Truck Parts offers lifetime returns for any reason on NEW, UNOPENED items in the original packaging, with exceptions (see restocking fee, excluded categories, used items, sale items and special order items below).
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Restocking fee and return shipping
Returns of new, unopened items are subject to a 20% restocking fee, which is deducted from your refund. You pay the shipping to send the item back, and shipping costs are not refunded.

Excluded categories
Engines cannot be returned. If one is defective, see defective parts (warranty) below.

Used items (if applicable)
Items marked as USED at the time of sale will be accepted for return up to 30 days from the date of sale.

Defective parts (warranty)
A part that fails is handled through the manufacturer's warranty process, not as a return. The manufacturer reviews the claim and decides whether the part is defective for the application it was purchased for. If you need a part right away, you will need to purchase a replacement rather than wait on the warranty review. Start a warranty claim at help.allprotruckparts.com.

Sale items (if applicable)
Only regular priced items may be refunded. Sale items cannot be refunded.

Special order items (if applicable)
Special order items may be eligible for a refund. The decision to accept a special order item for refund is left solely to the All Pro Truck Parts management team.

How to start a return
Start your return online at help.allprotruckparts.com/returns with your email or phone number and order number. Questions? Text us at (903) 527-5854 or email sales@allprotruckparts.com.
Ship your return to: All Pro Truck Parts, 3948 Interstate 30 W, Caddo Mills TX 75135, United States.
You are responsible for paying the shipping costs to return your item. Shipping costs are non-refundable. If you are shipping an item over $75, we advise using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

Refunds
Once your returned item is received and inspected, we will send you an email to let you know we received it and whether your refund is approved.
If approved, your refund will be processed and credited to your credit card or original method of payment within 7 business days. For orders paid on our card terminal, text or email us to start the refund.

"Free Shipping" orders
If we paid the shipping on your order ("Free Shipping"), the cost of shipping it to you will be deducted from your refund when the item is returned and inspected.

Exchanges
We only replace items if they are defective or damaged. If you need to exchange it for the same item, start it at help.allprotruckparts.com/returns or text or email us, and send your item to the return address above.

Read our full return policy.