Injen® - Exhaust System

4.532 reviews / Item # sp80
Injen® - Cat-Back Exhaust System
Injen® - Cat-Back Exhaust SystemInjen® - Axle-Back Exhaust SystemInjen® - Axle-Back Exhaust SystemInjen® - Axle-Back Exhaust SystemInjen® - Dual Axle-Back Exhaust SystemInjen® - Axle-Back Exhaust SystemInjen® - Cat-Back Exhaust SystemInjen® - Cat-Back Exhaust SystemImage may not reflect your exact vehicle! Injen® - Cat-Back Exhaust SystemInjen® - Cat-Back Exhaust SystemInjen® - Cat-Back Exhaust SystemInjen® - DownpipeInjen® - Axle-Back Exhaust System - InstalledInjen® - Axle-Back Exhaust System - InstalledInjen® - Dual Axle-Back Exhaust System - InstalledInjen® - Cat-Back Exhaust System - InstalledInjen® - Axle-Back Exhaust System Installation InstructionsInjen Authorized DealerInjen Special OffersInjen Special Offers
$202.73 - $1,158.98
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Injen Air Intake Systems

Exhaust System by Injen®. The perfect complement to your Injen air intake system is an Injen performance exhaust system. Each exhaust system is dyno-tuned together with the air intake system to achieve maximum horsepower and torque across the power band.

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  • Increases horsepower and torque
  • Manufactured from 100% 304 stainless steel
  • Straight through muffler design
  • CNC mandrel bent tubing and CNC machined flanges
  • Robotic Tig welded
  • Stainless steel tip or Titanium tip
  • Backed by a limited 1-year warranty
  • Proudly made in the USA

One of the most common questions that arise when enthusiasts modify their cars is whether aftermarket parts will work together: Will these wheels work with those brake calipers? Will those lights work with this grille guard? Wouldn’t it be great to be able to buy parts that were designed to work together as a system? You can with an Injen performance exhaust system. Injen exhaust systems are dyno-tuned with their air intake systems to produce the most power possible over a broad power band.

And Injen exhaust systems are manufactured using premium materials and modern techniques to ensure they fit perfectly and last for as long as you own your vehicle. All parts are made from 100% 304 grade stainless steel to prevent failure from rust and corrosion. All tubing is CNC mandrel bent, all flanges are CNC machined and all parts are robotic Tig welded to make sure your installation goes smoothly.

Depending on application, Injen exhaust systems are available with either a stainless steel exhaust tip or a burnt Titanium finish exhaust tip. Every Injen performance exhaust system comes complete with everything needed for installation, including comprehensive instructions.

Injen Technology Company, Ltd., based in Pomona, California, was formed as a sister company to RD Metal Works in 1998, to utilize the experience and design capabilities that RD Metal Works had gained designing and manufacturing air intake kits for leading air filter and intake manufacturers. Since that time, the company has made it a point to stay at the forefront of performance technology, continually setting new standards for quality and improving their engineering and manufacturing capabilities. This enables Injen to regularly introduce new, cutting edge products to market and has required the company to continually expand to meet the demand for those products. Today, Injen continues to set the industry benchmark for innovation, styling and technology.

Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Injen® - Cat-Back Exhaust System
Injen® - Exhaust System
Average Rating: 4.6 of 5
4.8 of 5
Injen Axle-Back Exhaust System
This product has great look, high quality welds and very easy and clear instructions. Everything is as advertised. The sound is not to loud and not obnoxious, but you can hear it even with the radio on. High quality, good service. I recommend it to anyone looking for sound improvement and great look.
NPosted by (Valrico, FL) /
2012 Honda Civic Si
Was this review helpful for you? Yes
4.8 of 5
Very Nice
It's the only shiny part on the bottom of my car now, but i think that the muffler tip is too short needs to be at least 2 more inches longer, because the badge that they put on is covered by the bumper, but its pretty not too loud, but it can be loud.
SPosted by (Mckinney, TX) /
2011 Nissan Juke
Was this review helpful for you? Yes
5 of 5
Injen Axleback :)
This exhaust is great, its a nice deep sound not insanely loud when idling, its music to my ears, easy installation, looks great, 5/5 great quality.
BPosted by (Saskatoon, SK) /
2010 Mitsubishi Lancer
Was this review helpful for you? Yes
3.8 of 5
The Average Joe
If you are looking at this for a Dodge dart it is for the Limited version not the aero. I found that out the hard way. This exhaust is great looking. Everything you need is there as long as you keep some of the factory nuts and bolts. It sounds great. Ease of installation is a 4 star because I have the aero version and not the limited I had to do extra like cut my bumper for the exhaust to come out at.
TPosted by (Modesto, CA) /
2014 Dodge Dart
Was this review helpful for you? Yes
5 of 5
So Impressed
Honestly being an international customer its always scary ordering things online for your car not knowing if its going to fit or be somewhat near perfect especially something like an exhaust system. Honestly this exhaust has exceeded my expectations. I ordered this for a 2005 350z and it fits perfectly almost as if it were custom made on the car itself! It has such a deep tone to it, a kind of deep rumble could not have wanted a better sound. No rasp whatsoever! Installation was such a breeze, the sound is amazing, honestly could not be happier, thank you CARiD, yet another smooth order with an amazing product. Highly recommend this for all 350z owners out there.
RPosted by (Ajman, AA) /
2003 Nissan 350Z
Was this review helpful for you? Yes
3.5 of 5
Injen Axle-Back Exhaust System
The tip didn't fit correctly in one side, one side look longer than the other!
EPosted by (Vega Baja, PR) /
2008 Subaru WRX
Was this review helpful for you? Yes
4.3 of 5
Fast Delivery, Quality Part
This product arrived at my house within 7 business days. Came in perfect condition. Very happy with the service.
JPosted by (Ypsilanti, MI) /
2010 Hyundai Genesis
Was this review helpful for you? Yes
5 of 5
Awesome Exhaust For My Birthday
Exhaust definitely enhanced the look of my car. The sound that it puts off is awesome and a lot of fun to play around with. We had it professionally installed at a cost of only $50. This purchase was well worth it and acrid is an awesome company to order from. Website is easy to explore and order process was also easy. Thanks
NPosted by (Uniontown, PA) /
2012 Honda Civic Si
Was this review helpful for you? Yes
5 of 5
A Must-Have to Complete Your Catback
With this and the catback your Juke will make you smile every time you drive! Easy installation. Did it in my driveway with my girlfriend! No issues.
CPosted by (Spanaway, WA) /
2013 Nissan Juke
Was this review helpful for you? Yes
5 of 5
Great Exhuast!!!
This is the only exhaust you should put on a Nissan Juke, excellent quality and amazing sound! No drone or rasp no. Just deep clean performance sounding. And not loud at all in the cabin.
CPosted by (Spanaway, WA) /
2013 Nissan Juke
Was this review helpful for you? Yes
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Injen® - Cat-Back Exhaust SystemInjen® - Exhaust System    $202.73 - $1,158.98
4.532 reviews
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