16-18 Focus RS MRT Extreme Cat Back

2016 - 18 Focus RS MRT Extreme Cat Back Performance Exhaust System 91J000
MRT 304 Stainless Cat-back: 2016-2018 Focus RS #91J000
MRT Part# 91J000 Loudness: 10 Drone: 2 Performance: 8

Application: 2016 thru 2018 Focus RS
Tune: None Required
Time to Install: 60 Minutes
Retail Price: $1,799.99
Your Price: $1,499.99
Sale Price: $1,349.99

Price with Options: $1,349.99

Availability: Usually Ships in 1 to 2 Business Days

Available Options:

Product Details Technical Specs Installation Instructions
The Focus RS MRT Extreme Cat Back has a loud, deep muscle car sound and is handcrafted in T304 Stainless Steel. This system includes 3" mandrel-bent tubes and dual 4" double wall, polished T304 stainless steel tips with beveled edges. This system is engineered for the best sound to match your vehicle and provides increased performance from the increased exhaust flow. The Extreme Cat Back is the Loudest MRT Cat-back for your Focus RS. It has just enough exhaust presence with elevated sound to Get Noticed, plenty of opportunities to Feel the Performance, and is packaged in a design without the excessive drone.

For customers with factory-installed Active & Dual Mode Exhaust valves, MRT offers and recommends a simple solution that allows you to upgrade your exhaust system without having to develop a tune. For more information on these plates, refer to MRT Part #92G155 or simply add to your shopping cart before checkout.

Application: 2016 thru 2018 Focus RS 2.3L 4-cylinder

Hear the Difference
  • How does it sound? The Focus RS MRT Extreme Cat Back #91J000 has a loud, deep muscle car sound.
  • Is there drone or resonance? The drone is noticeable but tolerable.
  • What if I step on it? Wide-open throttle increases exhaust loudness and tone to an aggressive performance sound.
Are you located close to Plymouth, MI, and need your MRT aftermarket exhaust installed? Call MRT at 734-455-5807 to make an appointment today!

91J000: 16-18 Focus RS MRT KR Cat-Back Review
  • DIY installation for the backyard mechanic
  • T304 Stainless Steel for the best corrosion resistance
  • Engineered, designed and manufactured in the USA

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

5 of 5 Makes the RS sound like it should! July 18, 2017
Reviewed by: Tyler Boes from Monroe, MI United States  
This exhaust system gives the RS turbo noise, depth, and sound. Stock, the RS sound is lacking. Since putting this system on my car, I have turned way more heads. I have seen people jump in their seats when the exhaust pops in sport mode. Being 21, I usually drive the car pedal to the floor, but sometimes I do just want to cruise. This exhaust is easily controlled with the throttle. If you want to just sound normal, just drive it like a normal car. There is no resonator or muffler, but there is no drone at all. For gas mileage, I average at 25 MPG, and I don't drive the car like Grandma and Grandpa. This exhaust system also eliminates a major design flaw in the stock exhaust system. There is a point just after the downpipe where the exhaust forms a bout a 1 1/2 inch triangle for packaging reasons and tool/hand clearance on Ford's side. MRT eliminated this feature for a more open and better flowing exhaust system. I would absolutely recommend this system.