COBB Turbo-Back Exhaust System 3" Stainless Steel With GESi Catted Downpipe Focus ST 2013-2018

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  • Catalytic Converter
  • Cat-Back and Downpipe Combo
  • Made of 304 Stainless Steel
  • Custom Inline Mufflers
MSRP $1,494.00
You save $69.00

COBB Stainless Steel 3" Turbo-Back Exhaust System with GESi Catted Downpipe for 2013, 2014, 2015, 2016, 2017 and 2018 Focus STs.

COBB made a cat-back exhaust into a Stainless Steel 3" Turbo-Back Exhaust System 591301 with the GESi Catted Downpipe and built-in high-flow catalytic converter. Directly replace the stock 2013-2018 Focus ST exhaust you currently have for a full 304 stainless steel, a custom inline system featuring massive 4-inch double-wall tips! Your dual tips will release a deep exhaust note that is drone-free.

This Turbo-Back Exhaust System includes a COBB 3" downpipe and 3" cat-back pipe put together in a kit for a complete bolt-on exhaust system. The durable steel construction holds up well under stress and assault, leaving your beautiful TIG weld seals in great condition. CNC mandrel bent tubing creates the perfect fit every time and eliminates leaks.

Features and Benefits:
- Cat-Back Exhaust System
- GESi Catted 3" Downpipe (300 Cell Count GESi Catalytic Converter)
- Premium Stainless Steel Construction
- Dual 4" Double-Wall Tips
- Drone-Free Exhaust note
- Bolt-On Installation
- TIG Welded, CNC-Mandrel Bent Tubing

The 3" downpipe has a 4" flex section and offers a 300 cell count GESi catalytic converter. This high flowing cat decreases restriction for better exhaust flow. The COBB downpipe bolts up to your factory turbo with a V-band flange. Although a 2-1/2" gasket is included to bolt-up to a factory cat-back, the 3" gasket is used to connect to the COBB cat-back for a perfect seal and unrestricted flow. COBB custom inline mufflers minimize restrictions and increase exhaust velocity for added horsepower. 

Please Note: Ford designed the 2015+ Focus ST with four exhaust hangers but only added three on the factory exhaust system. All aftermarket exhaust systems are built to use that fourth exhaust hanger. CJ Pony Parts recommends the purchase of COBB’s Polyurethane Exhaust Hanger Kit (591001).

Tech Tip: Pair this COBB 3" Stainless Steel Turbo-Back Exhaust System with a COBB Accessport V3 Tuner for a fantastic bump in horsepower. COBB offers ready-to-run maps to maximize power made from their cat-back exhaust system.

California Residents: Proposition 65 Warning

Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California.

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

We’re here with a COBB Turbo Back Exhaust for you 2013 and 2016 Focus ST. This COBB Three Inch 304 Stainless Steel Turbo Back Exhaust features a down pipe with a high flow catalytic converter, a flex section, and a full three inch stainless steel cat-back exhaust with two straight through mufflers and dual polished four inch angle cut tips. This turbo back exhaust will improve the look, performance, and sound of your Focus, and includes all necessary hardware and gaskets. Paired perfectly with the COBB Access port, this turbo back exhaust can be found along with other parts for your Focus ST at

Vehicle Fitment

This product will fit the following Focus years:

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