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Exhaust› Catalytic Converters

Mishimoto

WRX Catted Downpipe

Name: WRX Catted Downpipe
Brand: Mishimoto
SKU: MMDP-WRX-15CAT-MM

$774.98

SKU: MMDP-WRX-15CAT-MM

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Mishimoto Catted Downpipe is a direct-fit upgrade for the 2015-2021 Subaru WRX. It features smoother bends and a larger piping diameter compared to the factory pipe. This design results in increased horsepower and torque, along with improved engine response.

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The Mishimoto Catted Downpipe is engineered as a direct-fit replacement for the 2015-2021 Subaru WRX. Constructed from a single piece of 304 stainless steel with precision TIG welds, this downpipe allows for uninterrupted exhaust flow. Its design features smoother bends and a larger piping diameter, specifically a 3.5" to 3.0" transition from the turbo outlet, to facilitate smoother exhaust gas flow. Dyno-proven gains of up to 57 WHP and 52 WTQ are achievable with the catted downpipe and a tune using 93 octane fuel on a 6-speed transmission. Even greater gains of up to 73 WHP and 64 WTQ can be realized when paired with the Mishimoto Performance Air Intake and a tune. The downpipe includes an additional wideband oxygen-sensor bung with a plug, making it ideal for aftermarket sensor installations. This catted downpipe is compatible with both CVT and manual transmissions, providing an aggressive turbo and exhaust flow under acceleration and boost.

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

Brand	Mishimoto
Part Number	MMDP-WRX-15CAT-MM
Category	Exhaust

Videos

Mishimoto Catted Downpipe - 2015 Subaru WRX Install/Review

Mishimoto Exhaust Test for the 2015 Subaru WRX

2015 Subaru WRX Limited: Ep. 53: Mishimoto J-Pipe Install/Review Part 2

2015 Subaru WRX Limited: Ep. 54: Mishimoto Drive

2015 Subaru WRX Ep. 51: Unboxing the Mishimoto Catted J-Pipe

Mishimoto Chargepipe Review/Issues: 2015 Subaru WRX

2015 Subaru WRX Limited: Ep. 52: Mishimoto J-Pipe Install/Review Part 1

2015 Subaru WRX Limited: Ep. 95: Mishimoto Catted J-Pipe with Stock Exhaust Clip

2015 Subaru WRX catless mishimoto tbe

Mishimoto Cat Back Exhaust - 2015+ Subaru WRX - Exhaust Video

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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

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