Exhaust› Exhaust Pipes, Systems and Components

Grimspeed

3-Inch Catted J Pipe

$829.00

SKU: GRM 007103

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The GrimmSpeed J Pipe/Downpipe is a 3-inch catted exhaust component designed for the 2015 Subaru WRX. Constructed from 304 Stainless Steel in the USA, it features a 3-D contour flange for the wastegate port and includes an O2 bung. This downpipe aims to maximize exhaust flow, improve turbo response, and increase power potential. A tune is required after installation, and a check engine light may occur due to catalytic converter efficiency.
Show original supplier description
The GrimmSpeed J Pipe/Downpipe is a catted exhaust component crafted from durable aluminum, featuring a 3-inch diameter. This component is specifically designed for the 2015-2021 Subaru WRX models equipped with a manual transmission. It integrates seamlessly with the OEM bracket during installation, allowing for the use of 1/2" thick flanges. The inclusion of a catalytic converter helps manage emissions. From a completely stock vehicle, users can expect a gain of around 45whp (27%) and 70wtq (41%) with the installation of the GrimmSpeed J-Pipe and custom tuning. Note: Installation on 2015-2021 Subaru WRX manual transmissions requires custom tuning. This product is California warning compliant.

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

BrandGrimspeed
Part NumberGRM 007103
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.

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