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Roush

Roush 421145 Exhaust System

Based on 55 reviews
Condition: New
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$729.99

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Availability: Only 2 left in stock, order soon!
Fulfilled by Yates Performance
Arrives Tuesday, Nov 17
Order within 11 hours and 58 minutes

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At a glance

Condition
New
Weight
27 lb
Color
Stainless Steel
Vehicle Service Type
Car
Shape
Round
Installation Type
Clamp-On

Features 1

  • 421145

Description

This kit fits 2011-2014 V6 Mustangs and features an all-new ROUSH open- chambered muffler with round tips. In contrast to the conventional fiberglass- packed muffler design, this open muffler has a less inhibited sound, increased longevity (because there is no fiberglass packing that tends to break-down over time), and increased air flow for maximized power. Another great feature of this system is the elimination of the in-cockpit boom, which is common in performance exhaust systems at cruising speeds. The round tips of this Mustang dual exhaust kit are made from high-quality 304 stainless steel. The shiny finish of these tips are made with a special chrome flashing process that is dramatically more resistant to cracking and flaking than conventional chrome surfacing. The mufflers and inlet pipe are made from 409 stainless steel for improved durability. This V6 Mustang Exhaust kit installs quick and easy. It uses the factory hanger mounting points -- you don't have to fabricate your own. This kit also features spherical OE-quality clamps for a perfect fit.

Specs 17

Color Stainless Steel
Brand Roush
Material Stainless Steel
Vehicle Service Type Car
Shape Round
Brand Name Roush
Manufacturer Part Number 421145
Number of Items 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Nov 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Awesome Sound!!
Review Image by Karen Edwards Karen Edwards
The media could not be loaded. Better than expected. We did a lot of research and the Roush Axle Back seem to have the most consistent reviews. We listened to numerous sound videos. The videos do not do this justice. Sounds far better than what we expected. Very easy to install.
Reviewed in the United States on September 12, 2020 by Karen Edwards Karen Edwards
Amazing sound!
My husband's '13 mustang sounds amazing with this! It was not hard to install, it's easier if you have the rear end lifted. It is loud, especially with acceleration. When you have the car in drive and just coast it isn't loud at all. It is kind of like a purr when it's just coasting. I highly recommend, well worth the money! ... show more
Reviewed in the United States on May 1, 2020 by Alex France
Better than expected! Warning it's loud but in a good way
This system looks great! And it is loud! I love it. It has a great rumble at idle and at speed with higher rpm it has like an exotic car sound. I did notice a little boom at freeway speeds but not really a bad one. After a few days I'm used to the sound and love it even more! Tunnels, omg drive thru a tunnel roll your window down, drop a gear or two and enjoy the wonderful sound!!! It has that cool popping sound when decelerating. One cool thing I noticed is I'm getting 4 more mpg! Even with driving hard and hammering it its still getting better milage than before. Mixed driving I was getting 22 to 24 now it's 26 to 28 ... show more
Reviewed in the United States on October 3, 2013 by Ryan
Fits 2012 v6 Mustang
Review Image by Anthony Luna Anthony Luna
Review Image by Anthony Luna Anthony Luna
Starting off with a muffler delete the roush provides a way better sound . It's more of a deep tone. Also because of the muffler delete the removal was way easier for me . Don't expect any bangs or pops like most videos though .
Reviewed in the United States on January 25, 2022 by Anthony Luna Anthony Luna
Roush is the only exhaust to buy for your mustang
Super easy to install, sounds amazing!!! I did it in my garage in about an hour to take my stock off and put my Roush on. WARNING: if you don't use a lift and take off the pipe in the front the driver side will give you a run for your money. I did all mine on the ground with no jack or lift and the driver side is a tighter squeeze than the passenger side, but it is do able, but if you want your stock off and roush on in less than 20 minutes i suggest using a lift and unbolting the front part of the pipe. Great product!! ... show more
Reviewed in the United States on September 3, 2014 by charles j zettel
Roush axel-back INSANE !
Doesn’t let me add a video, but I’m a 17 year old senior with a 2014 mustang v6 and this exhaust is phenomenal it’s cheap and worth the money trust me guys ! Unfortunately it doesn’t let me add a video..
Reviewed in the United States on August 25, 2022 by Rito Beltran
Like the 3-star rating says
I bought my 2012 Mustang V-6, 6 speed manual, used 3 months ago, and decided to jazz up the exhaust a bit. Like the 3-star rating says, "it's OK." The caveat is, I'd never done this before - putting a performance exhaust on a car - and had some erroneous assumptions. The exhaust sounds fine at idle, and when revving the engine. Also sounds good under acceleration, although it tends to backfire in the 1-2 and 2-3 shifts, and drone pretty heavily under load. I can live with the backfiring (with apology to the neighbors), but the drone is aggravating, as it is there most of the time at highway speeds in sixth gear. I live in a somewhat hilly area (central TX), and any incline will bring on the drone. I can get rid of it by staying in fifth gear, and I don't lose more then 5-10% gas mileage by doing that, but still... Unfortunately, there didn't seem to be an easy way to sonic-sample exhausts outside of youtube, and that didn't give the full experience. ... show more
Reviewed in the United States on March 31, 2015 by Retired_NASA_Engineer
Great exhaust! Very quick and easy install
Great exhaust ! Very quick and easy install. If u have trouble getting them off the ha gers use a little spray lube/grease it makes it very easy. The exhaust is great at normal speeds little to no drone at all but at 3k rpm it does get raspy but once u pass it it's back to normal. Overall great buy and great exhaust 5 stars ... show more
Reviewed in the United States on November 17, 2014 by Devin Cornell
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