Injen® - Exhaust System

4.536 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® - 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 Dealer
$179.78 - $1,158.98
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Product Details

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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.

Injen FAQsInjenInjen About


  • 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.

Warranty Information

Find out everything you need to know about the product warranty

Injen Technology offers a Limited Lifetime Warranty to the original purchaser against defects in material and workmanship on all intake systems excluding the filter element. Injen Technology will replace at no charge, any intake pipe considered by Injen Technology to be defective.

The warranty is void if the warranty card is not returned to Injen Technology within the first 30 days of purchase. Any and all warranty coverage is limited to the repair or replacement of the defective part only, at Injen Technology's discretion. Proof of purchase is required. The warranty does not cover incidental or consequential damages, nor does it cover the cost of installation or removal of the defective part or its replacement. All warranty items must be sent freight prepaid with a valid RMA (Return Merchandise Authorization) number and copy of original invoice.


Injen Technology reserves the right to make changes in design, material and specifications, or to make product changes as deemed necessary without prior notice. Injen Technology reserves the right to change the design of any product without assuming any obligation to modify product previously manufactured.


The Magnusson-Moss Warranty - Federal Trade Commission Improvement Act of 1975 protects consumers from such fraudulent activity by new car dealers. Under this Act, aftermarket equipment that improves performance does not void a vehicle manufacturer's original warranty, unless the warranty clearly states the addition of aftermarket equipment automatically voids your vehicle's warranty or if it can be proven that the aftermarket device is the direct cause of the failure. The easiest way to check this is to look in your owner's manual under, "what is notcovered". Under Magnusson-Moss Act a dealer must prove, not just vocalize, that aftermarket equipment caused the need for repairs before they can deny warranty coverage. If they cannot prove such claim-or offer an explanation - it is your legal right to demand compliance with the warranty. The Federal Trade Commission administers the Magnusson-Moss Act and monitors compliance with warranty law. Ct cause of the failure. The easiest way to check this is to look in your owner's - Moss Act a dealer must prove, not just vocalize, that aftermarket equipment caused the need for repairs.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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
4.5 of 5
El exhaust se ve increble, el sonido muy agresivo (perfecto) y es muy facil de instalar.
RPosted by (Los Angeles, CA) /
2012 Mitsubishi Lancer
Was this review helpful for you? Yes
5 of 5
Injen Exhaust
Sounds great, looks great, not too loud, but doesn't sound like a toy, sounds like a race car.
JPosted by (Palm Coast, FL) /
2012 Honda Civic Si
Was this review helpful for you? Yes
4.5 of 5
Ingen Axel Back Exhaust
The looks of this exhaust is second to none. High quality chrome, awesome shine. Just nice to look at. Not only top quality materials but also high quality welding so you don't have to worry about leaks with this baby. And on top of that, very easy to install. Took me about 20 minutes to do on my driveway. The sound is perfect. Not to loud, just loud enough. Definitely you will hear your sporty exhaust note now but you will be able to talk and listen to music too without yelling or maxim your stereo system. Definitely will recommend this product to everyone. I like it so much that I just bought this one for my daughter's Si.
NPosted by (Valrico, FL) /
2012 Honda Civic Si
Was this review helpful for you? Yes
4.5 of 5
Amazing product like for real I got this installed with my OBX Headers LT, so the noise of the car is super deep and I only recommend you put them with those headers if your planning on making major modifications to make them fit.
CPosted by (Denver, CO) /
2006 Mitsubishi Eclipse
Was this review helpful for you? Yes
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
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Injen® - Cat-Back Exhaust SystemInjen® - Exhaust System    $179.78 - $1,158.98
4.536 reviews
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