Injen 16-18 Ford Focus RS 3in Cat-Back Stainless Steel Exhaust w/ 4in Black Chrome Tips

The 2016-18 Focus RS is a machine the demands attention and respect wherever it's driven. The Injen Technology cat-back exhaust system compliments the Focus RS with impressive power, gorgeous looks, and a distinct sound that is unmatched. , , Unlike our competition that uses stepped down tubing, the Injen Technology system is a full 3"cat-back unit that is mandrel bent using only the best 304 stainless steel available. Another unique feature of the Injen cat-back exhaust system for the RS is that is utilizes individual resonators instead of a single traverse style muffler. Not only does this provide a unique sound, but also help to free up power throughout the RPM range. Injen Technology also decided to bypass the factory exhaust valve and provides a custom exhaust valve bypass module (P/N 2002) with every Injen Focus RS exhaust system. This allow you to enjoy that rich, crisp sound of your RS whenever you want. , , The rear of the Injen Technology RS cat-back system is a work of art and employs multiple slip fittings to allow an infinite amount of adjustment for a precise fit right out of the box. Dual 4"black chrome exhaust tips complete the exhaust and provide a finished look. , , Quality Construction; This Injen Technology exhaust system is constructed from 3"mandrel-bent 304 stainless steel tubing for maximum flow and long service life. From there, every aspect of the system is hand TIG-welded by our experts in our Pomona, California headquarters. , ,

Additional Information

Performance Exhaust System, Part No. SES9004, 2016-2018 Ford Focus RS L4-2.3L Turbo.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Beautiful dual 4.5"black chrome exhaust tips
• CARB Exempt- NO
• Designed and Manufactured in Pomona, CA
• Dyno Proven gains of up to 16 hp and 14 lb-ft. of torque
• Features dual Injen Resonators to deliver a clean, crisp, distinctively Injen sound
• Full 76MM piping made from premium 304 SS Mandrel-Bent Tubing
• Hand Crafted and TIG Welded to Perfection for Strength and Durability
• If you're looking to improve sound, power, and looks then this is the system for you!
• Injen's Gen2 Axle Back design for the Focus RS
• No Cutting or Welding Required
• Premium Stainless Steel Hardware and Hangers for a simple install
• Stainless Steel Investment Cast Flange for a Fast and Easy Install
• Unique and Fully Adjustable design for perfect fit and alignment

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

CAT-BACK EXHAUST SYSTEM, 2016-2018 Ford Focus RS I4-2.3(t), 3" 304 Stainless Steel Cat-Back Exhaust System with Dual 4" Black Chrome Tips

Injen Technology's Super SES exhaust systems are dyno-tuned to complement their performance intake systems. In doing so, the Super SES systems provide maximum horsepower and torque across the power band. The Super SES exhaust systems are manufactured from 100 percent 304 stainless steel. Each exhaust system features CNC mandrel-bent stainless steel tubing, CNC-machined flanges, and robotic TIG welding. They also feature a straight-through muffler and Injen's unique flared tip design.