Exhaust› Exhaust Pipes, Systems and Components

Classic Diesel Designs

3" Downpipe Upgrade

$247.95

SKU: CDD3DOWNPIPE

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Classic Diesel Designs CDD 3" Downpipe Upgrade provides a 3-inch diameter solution for the IDI market, offering an alternative to the discontinued Banks 2.75" downpipe. This upgrade utilizes the factory marmon style flange and clamp for direct integration. This downpipe is specifically engineered to replace the factory crushed downpipes found on 7.3 IDI models. It can also be used to replace the slip joint downpipe and elbow on an ATS 093 kit, with the condition that a factory turbo style elbow is also installed. The product is available with or without a clamp, and with different coating options like silver or black, or no coating.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandClassic Diesel Designs
Part NumberCDD3DOWNPIPE
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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