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Exhaust› Exhaust Pipes, Systems and Components

Fswerks

Stealth 3-Inch Cat-Back Exhaust System

Name: Stealth 3-Inch Cat-Back Exhaust System
Brand: Fswerks
SKU: FS027STQ

$814.75

SKU: FS027STQ

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The FSWERKS Stealth Exhaust system is a 3-inch diameter cat-back exhaust designed for the Ford Focus ST EcoBoost.

It features mandrel-bent T304 stainless steel tubing for maximum flow and horsepower support, a 24-inch high-flow straight-through muffler, and polished dual-wall, 4-inch angle-cut T304 stainless steel tips. The system includes necessary clamps, hardware, and instructions for installation and retains all factory emissions equipment.

Show original supplier description

Introducing the FSWERKS Stealth Exhaust system, engineered for the Ford Focus ST EcoBoost (2013-2018). This cat-back system is constructed from 3-inch diameter mandrel-bent T304 stainless steel tubing, designed to maximize flow and support over 500 wheel horsepower. The heart of the system is a 24-inch stainless steel high-flow, straight-through muffler, delivering a deep, resonant sound at idle and during normal driving, which wakes up to an aggressive tone at high output without being excessively loud. The exhaust is finished with polished dual-wall, 4-inch angle-cut T304 stainless steel tips for an aggressive aesthetic. Construction utilizes precision Tig and Mig welds, with laser-cut T304 stainless steel flanges and solid bar hanger rods for durability. It weighs approximately 40 lbs, a slight reduction from the stock OEM system's ~45 lbs. FSWERKS backs this system with a 5-year limited warranty. This exhaust system is CARB legal and retains all factory emissions equipment. It is specifically designed to fit the Ford Focus ST 2.0L EcoBoost Hatchback models from 2013 to 2018. While generally praised for its fit and finish, one user noted that the fitment was poor on a system with more sections to align compared to the FSWERKS design. Another user mentioned that while the system is quiet during normal driving, a low-frequency drone can develop under load when climbing a hill without downshifting, which can be mitigated by downshifting.

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	Fswerks
Part Number	FS027STQ
Category	Exhaust

Videos

Geoff's FSWerks Exhaust Install (2014 Ford Focus)

FSWERKS 2.5" Stealth Exhaust System (2012 Ford Focus)

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Fswerks 2012 Stealth Exhaust

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SVT Focus w/FSWerks Race Exhaust

2012 Focus FSwerks Exhaust

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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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