SKU: 3545414447

Injen Technology Stainless Steel Cat-Back Exhaust System (SES9004)

Sale price$636.83 Regular price$707.59
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

Injen Technology Stainless Steel Cat-Back Exhaust System (SES9004)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

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.

Dual Black-Chrome Exhaust Tips:

Dual 4" black chrome exhaust tips are the finishing touch on this beautiful exhaust system. The tips bolt-on for easy adjustments and provide a visual punch that will set your Focus RS apart for the pack!

Exhaust Valve bypass module included:

Injen Technology 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 and without fear of your valve sticking open or closed when you least expect it.

OE Style Fitment:

OE-Style exhaust hangers are used throughout that utilize the OE hanger bushing that came with your Focus RS. This allows the system to install and flex like the factory system during high-stress situations without any damage. A true hassle-free installation with no cutting required.

Dyno Proven:

Plain and simple, NUMBERS talk! We put in the time to test and prove that we have developed a superior exhaust system for your Focus RS. After hours of designing and dyno testing, Injen is proud to say that the SES9004 cat-back exhaust system puts down numbers of up to 16 additional horsepower and 14 lb-ft. of torque.

Engineered and manufactured at the Injen Technology headquarters in Pomona, Ca.

Features:

  • Direct fit for 2016-2018 Ford Focus RS L4-2.3L Turbo
  • Dyno Proven gains of up to 16 hp and 14 lb-ft. of torque
  • Dual 4" black chrome bolt-on exhaust tips
  • Stainless Steel Investment Cast Flanges for a Fast and Easy Install
  • Hand Crafted and TIG-welded to Perfection for Strength and Durability
  • Dual High Flow Resonators for an Aggressive Sound and Unmatched Performance
  • Top Tier 304 SS Mandrel-Bent Tubing for lasting performance
  • Premium Stainless Steel Hardware and Hangers for a simple and hassle free install
  • Designed and Manufactured in Pomona, CA USA
  • This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 3545414447

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L l stearns
Grantham, US
★★★★★ 5
Great workout mat
Color: Green
It’s very thick and soft so it makes exercising a lot easier. It rolls easily ready to store. And it seems very durable. It is also flexible for certain exercises for balance.
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Reviewed in the United States on March 29, 2026
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TJV
Lexington, US
★★★★★ 5
Very sturdy. Great Quality
Color: Navy Blue
This is a very dense, thick mat. It's great if you have bad knees or just need/want a thicker mat. The carrying strap with velcro closures is easy to use.
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Reviewed in the United States on April 21, 2026
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Charl8
West Palm Beach, US
★★★★★ 5
Great cushioning, easy storage
Color: Blue
I am so happy I bought this. I do back stretches, and need to be on the floor.. Getting up & down is hard at 77, and carpets are hard. This helps sooo much! I don’t hurt my knees when getting down or getting up. The mat is comfortable and provides plenty of padding. It is easy to roll up and store with the included strap. I am tall, and there is extra length, so my head and feet are on the mat. This was a good purchase! This has not torn, and wipes down easily. It doesn’t attract dog hair, which is another reason I wanted a mat.
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Reviewed in the United States on March 21, 2026
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Verified Purchase
Tanner Henry
Whiting, US
★★★★★ 5
Great Knee Support
Color: Blue
The 1-inch thickness provides exceptional support and cushioning, making it ideal for a variety of exercises beyond just yoga. The high-density foam used in this mat is a game-changer. It not only cushions my joints but also retains its shape remarkably well. The carrying strap is a convenient addition, allowing for easy transport wherever I go. Plus, the mat is easy to clean, which is a huge plus after sweaty workout sessions. While the extra thickness might not suit everyone's preferences, especially if you prefer a thinner mat for certain poses, I find it perfect for my needs. It strikes an excellent balance between comfort and stability, providing the right amount of cushioning without compromising stability during balancing poses. Overall, the BalanceFrom All Purpose Yoga Mat will become an indispensable part of my fitness routine. Its durability, support, and easy maintenance make it a top choice for anyone seeking a reliable exercise mat for various workouts.
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Reviewed in the United States on November 27, 2023
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Kingstonbeat
West Palm Beach, US
★★★★★ 5
Perfect For My Routine
Color: Black
I am retired military, so exercise has always been a part of my daily routine. Since the pandemic I have had to adjust, which is hard because the gym has the equipment I have become accustomed to. I didn’t realize how different it was working out there as when I started to work out at home on my hard wood floors (no carpet anywhere). I thought it would be easy but the military exercise mat is entirely too thin and was making my tailbone hurt tremendously, so I had to give up my sit-ups and some other ab exercises. This kind of threw a wrench into my routine and I could start feeling my motivation go away. I decided to take a look on Amazon for a thicker mat. I should have done this long ago because I found this one I’m writing about. It’s the shape of any typical exercise Matt except it’s 1” thick. It appears to be made of a type of foam (not bothering to look at the description right now). When I pulled it out I thought I was going to sink in making sit-ups even harder but it’s firm but not hard. I like it better than what is at the gym. Durability will be hard to determine until I’ve had it a while but I’m definitely excited to start back up on my exercises. I recommend this mat if you have hard wood floors, bad back, bad knees, etc. I thought I read some negative reviews about mats this thick because of yoga and balance but I beg to differ. If balancing is part of your exercise routine, then a mat which makes balance harder is exactly what you want. Exercise is supposed to be challenging and you need to work harder to see a difference. If that isn’t your goal or if balance is a medical issue, this may not be the right mat for you. Something you may not think about is I have chronic foot pain and this mat makes it less painful for me to stand or jump. For me, this mat is perfect.
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Reviewed in the United States on July 26, 2020

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