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Exhaust› Exhaust Pipes, Systems and Components

MAP Performance

WRX Rev 4 Catted Downpipe

$827.99 $749.99 Save $78.00

SKU: WRX-4G-DPC-REV4

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 MAP Performance WRX Catted Downpipe Rev 4 is a performance exhaust component designed to improve exhaust flow. It features a 3.5" bell mouth that transitions to a 3" diameter, constructed from 304 stainless steel for durability and corrosion resistance. The downpipe is made in the USA and includes a stainless steel flex section to reduce stress from engine movement.
Show original supplier description
The MAP Performance WRX Catted Downpipe Rev 4 is engineered to significantly improve exhaust flow leaving the turbo for your 2015-2021 Subaru WRX MT. By replacing the restrictive factory downpipe, this component allows spent exhaust gases a quicker exit, which can lead to increased horsepower and torque across the entire power band. The Rev 4 features a 3.5" bell mouth that tapers to a 3" diameter, optimizing flow and reducing restrictions. It utilizes mandrel-bent tubing throughout to ensure smooth exhaust gas velocity. A stainless steel flex section is incorporated to mitigate stress caused by engine movement, thereby increasing the longevity of the exhaust system. The design also incorporates a 304 stainless steel CNC turbo outlet flange and utilizes the OEM turbo outlet gasket and ground strap. This downpipe is 100% Made in the USA. Please note that this product will not fit CVT models. Customers should select the appropriate option via the dropdown menu before ordering, especially if using a stock cat-back, as an optional Grimmspeed flange adapter may be required.

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

BrandMAP Performance
Part NumberWRX-4G-DPC-REV4
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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