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Exhaust› Exhaust Pipes, Systems and Components

Mishimoto

3in Catted Downpipe

$679.27 $612.95 Save $66.32

SKU: MISMMDP-MUS4-15CAT

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

Overview

The Mishimoto 3in Catted Downpipe is a performance exhaust component designed to increase horsepower, low-end torque, and improve throttle response. This downpipe is fabricated from 304 stainless steel and features a 2-piece design for uninterrupted exhaust flow. It is compatible with both automatic and manual transmissions and includes an extra bung for wideband O2 sensor installation.
Show original supplier description
The Mishimoto 3in Catted Downpipe is engineered to enhance performance for turbocharged vehicles by freeing up restricted exhaust flow. Fabricated from durable 304 stainless steel, this downpipe utilizes a two-piece construction to ensure a smooth, uninterrupted exhaust path. It is designed to directly mate with the factory cat-back system or any system with a 2.25" mid-pipe, featuring a 3" piping inner diameter. Installation is made straightforward with the inclusion of a v-band clamp, exhaust strap, and adapter flange. This downpipe is suitable for both automatic and manual transmission models and includes an extra bung provision for the convenient installation of a wideband O2 sensor. All necessary installation hardware is included with the kit. This Mishimoto downpipe is specifically designed for the 2015-2017 Ford Mustang EcoBoost models.

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

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Specifications

BrandMishimoto
Part NumberMISMMDP-MUS4-15CAT
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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