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  1. Exhaust Systems
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MagnaFlow Stainless Steel Cat-Back Exhaust System - Gas

MagnaFlow Stainless Steel Cat-Back Exhaust System - Gas

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Exhaust Systems

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MF16726 - 4 Inch MagnaFlow Exhaust Systems
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This cat-back exhaust system improves engine performance and durability by boosting horsepower and torque. Its technologically advanced, Mandrel bent tubing and straight-through muffler allow the exhaust to flow more freely through the system. Call 800-298-1624 to order MagnaFlow exhaust systems part number MF16726 or order online at etrailer.com. Free expert support on all MagnaFlow products. Guaranteed Lowest Price and Fastest Shipping for MagnaFlow Stainless Steel Cat-Back Exhaust System - Gas. Exhaust Systems reviews from real customers.
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  • Reviews (21)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

MagnaFlow Exhaust Systems

  • Cat-Back Exhaust
  • 4 Inch
  • 2-1/2 Inch
  • Gas
  • Rear Exit - Double Dual - Both Sides
  • MagnaFlow
  • Stainless Steel
  • Dual
  • 4

This cat-back exhaust system improves engine performance and durability by boosting horsepower and torque. Its technologically advanced, Mandrel bent tubing and straight-through muffler allow the exhaust to flow more freely through the system.


Features:

  • Improves engine performance by increasing horsepower, torque and fuel efficiency and decreasing exhaust gas temperature
    • Mandrel bent tubes allow for unrestricted airflow by maintaining the same diameter through every curve
      • Unrestricted airflow decreases back pressure ("exhaust turbulence")
    • Straight-through muffler has a stainless steel perforated core that runs straight through, end to end
      • Layer of stainless steel wool insulates the perforated core to absorb noise, shield high exhaust temperatures and prevent blowouts
      • Contains no baffles, chambers or louvers that restrict airflow
  • Signature sound is deep and throaty on throttle but quiet inside the vehicle
  • All materials made with 100% stainless steel
  • Clamps and hangers included for installation
  • Lifetime warranty

Specs:

  • Tubing diameter: 2-1/2"
  • Muffler is custom fit according to make and model
  • Tailpipe diameter: 2-1/2"
  • Tip diameter: 4"
  • Number of tips included: 4
  • Dual exhaust system
  • Split rear exit position

The cat-back system is the portion of the exhaust system from the outlet of the catalytic converter to the tailpipe. MagnaFlow systems have Mandrel bent tubes that allow for unrestricted airflow by maintaining the same diameter throughout every curve. This curvature leads to decreased back pressure.

MagnaFlow mufflers have a stainless steel perforated core that runs straight through the muffler, end to end, with no baffles, chambers or louvers that restrict airflow. A layer of stainless steel wool insulates the perforated core to absorb noise, shield high exhaust temperatures and prevent blowouts.

Together, the Mandrel bent tubes and straight-through muffler increase horsepower, torque and fuel efficiency and decrease exhaust gas temperature. MagnaFlow's signature sound is deep and throaty on throttle but quiet inside vehicles. All materials are made with 100 percent stainless steel. Clamps and hangers are included for installation. It includes a lifetime warranty.

Dyno chart displaying power and torque differences between OEM and MagnaFlow systems

This dyno chart displays the differences in power and torque between OEM (blue) and MagnaFlow (red) exhaust systems. The darker red and blue lines represent the torque measurements; the lighter red and blue lines represent the power measurements.



16726 MagnaFlow Cat-Back Exhaust System

Item # MF16726

Installation Details MF16726 Installation instructions

This Product Fits The Following Vehicles




Video of MagnaFlow Stainless Steel Cat-Back Exhaust System - Gas

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for MagnaFlow Exhaust Installation - 2006 Pontiac Grand Prix GXP

Today on this 2006 Pontiac Grand Prix GXP we are going to install part number MF16726 from MagnaFlow. The first thing you do is get underneath the vehicle and we will spray down the bolts that are on the exhaust with some penetrant and that should hopefully loosen them up. When a car is a few years, these fasteners will be rusted pretty well so you may end up breaking them. So be prepared to just replace the fasteners. Now we are going to leave this nut partially on for now because we need to hold it up while we disassemble the rest of the exhaust. So we will move on down towards the back of the vehicle and we will add a strap to help hold up the exhaust while we remove the rubber isolators. Ok, we are going to spray down the rubber isolators with some penetrant and go ahead and remove them. It looks like we have them all done on the passenger side. Now we will move over to the driver side and remove those. 1:00

Now we will get an extra set of hands and we will go ahead and remove that one bolt by the catalytic converter and lower everything. We have our existing exhaust system lying out. We will go ahead and lay the pieces to the MagnaFlow system next to it so we can see how everything fits together. Let us go ahead and start putting the new stuff up. We will start off with the resonator. However, it does not have any reassembled studs in here. So we are just going to get new hardware and just bolt it in place. Now I am going to keep everything loose for now. Now we will go ahead and move on to the next one. Alright, we will move on to our next piece right here. We will go ahead and slide on the isolator from the old exhaust. Get a clamp and put it into place. Now I will move to the T-pipe assembly. We will start on the muffler now on the passenger side. We are leaving everything loose for now so we can make our final adjustments later. 1:56

Alright, with all of our major components in place, we will go ahead and straighten them out as we need it and go ahead and start snugging everything down. We have everything sitting the way we want it. Let us go ahead and work on the tips now. Let us go ahead and just slide them on and just adjust them the way you see fit for enough clearance underneath the bumper cover. With all of our clamps snugged down and the exhaust is in the position that we want it, we will go ahead and torque down the bolts as specified in the instructions. Once you have everything torqued down, go ahead and take the protective coverings off the pieces and then we will go ahead and take it for a test drive and see how it sounds. And there you have it for part number MF16726 from MagnaFlow.


Customer Reviews

MagnaFlow Stainless Steel Cat-Back Exhaust System - Gas - MF16726

Average Customer Rating:  4.5 out of 5 stars   (21 Customer Reviews)

This cat-back exhaust system improves engine performance and durability by boosting horsepower and torque. Its technologically advanced, Mandrel bent tubing and straight-through muffler allow the exhaust to flow more freely through the system.

- MF16726
by:

The MagnaFlow exhaust looks and sounds awesome. Not only that but the stainless steel construction and lifetime warranty gives me peace of mind.



- MF15327
by:

Review from a similar Catback Exhaust in Exhaust Systems


Installation was easy, perfect fit, sounds great and engine roars! Thanks etrailer for the great customer service and MagnaFlow for a great product!



- MF15718
by:

Review from a similar Catback Exhaust in Exhaust Systems


Great customer care and service from Chris and the Etrailer employee's. Got back to me to let me know of a item was back ordered from a manufacturer, didn't try to over sell me on products, asked what I'd like to do. Helped me make changes to my purchase that I needed right away. Two days later they now have my business shopping loyalty from here on out. I can't thank you guys enough.



- MF15665
by:

Review from a similar Catback Exhaust in Exhaust Systems


Have to say that I was a bit skeptical at first, as I don't know anyone that has installed this particular kit. After installation, I am pleased to report that it has exceeded my high expectations. Kit came complete with everything needed to install (less the flange bolts). Initial sound was excellent...not too loud that it bothers the kids while they're sleeping in the car, but deep and loud enough to turn some heads. Excellent experience dealing with Etrailer as well. Will not hesitate to do business with them in the future. Thanks again for the super fast shipping and excellent customer service!


Comments
So during highway driving the drone is at a minimum? I have kids too and we take a lot of family trips. My concern is the drone. thanks,
-- comment by: B. K - 08/16/2014

Comments
Response to B. Kallan~ Highway noise is quite bearable, unless youre knee deep in your pedal. Going uphill it will be much louder, as it will with any acceleration. Constant highway speeds will result in a nice, mellow sound. Hope this helps!
-- comment by: Dave - 08/18/2014


- MF19019
by:

Review from a similar Catback Exhaust in Exhaust Systems


Hardest part of installation was getting the truck high enough off the ground to get the factory exhaust over the axle. The new system was relatively easy and fit perfect. The spare tire does not fit underneath with this kit installed. I put a Tire Buddy in the bed to hold the full sized spare. The heavy duty factory receiver hitch is not in the way. System has a mellow purr that should be street legal everywhere yet is semi-aggressive. No blatting or popping. Chrome tips seem to always get black with soot and need to be cleaned often. This is a premium system and should last the life of your truck. It is well supported and doesn't vibrate. I highly recommend it. If Chevy had this as an option they would sell lots more trucks.



- MF16636
by:

Review from a similar Catback Exhaust in Exhaust Systems


The exhaust system fit perfectly, sounds great, and looks stylish. The exhaust tone is not overly loud, yet sounds much more powerful than the stock system did.


Comments
The exhaust system has been awesome
Ron L - 01/15/2021


- MF15357
by:

Review from a similar Catback Exhaust in Exhaust Systems


My Magnaflow cat back exhaust system on my 2016 VW GTI gave me more of the sound I wanted for my little sports car, and it looks so much better than the stock exhaust system. Meaning: the stock muffler, which shows horizontally at the rear of the vehicle, looks like an afterthought, just a metal can. The muffler on the Magnaflow is hidden in a pocket near the center of the undercarriage, so it doesn't show at all. What is visible at the rear are the dual stainless steel pipes. In addition, the exhaust tips on the Magnaflow are larger in diameter to accommodate the larger diameter pipes, and therefore look more aggressive. I am very satisfied with the setup.


Comments
All is very well. No problems of any kind. Still enjoying the sound and the look.
Bob - 04/18/2019



- MF16564
by:

Review from a similar Catback Exhaust in Exhaust Systems


Very good performance and sounds installed myself in driveway in under 45 minutes. service was great from e-trailer.


Comments
Love the sound and performance With exhaust and Volant cold air intake and Superchips programmer we get 20-22 miles per gallon on the hwy.
John P - 07/23/2017



- MF16627
by:

Review from a similar Catback Exhaust in Exhaust Systems


Nice addition, not too loud and yet good rumble. Easy installation and would recommend it.



- MF16830
by:

Review from a similar Catback Exhaust in Exhaust Systems


Product nice. Fit could be better for trans am. Tail pipes don't show. Had to make extensions. Works ok now



- MF16669
by:

Review from a similar Catback Exhaust in Exhaust Systems


Not a great fit on my 2009 This kit sounds and looks great, but the three bolt cat flange didnt fit my truck, it required machining to spread the holes further apart, just a heads up my honda ridgeline was built in june of 2009 and the install took 5 hrs because of this issue, however when finished it sounds and looks great.



- MF15811
by:

Review from a similar Catback Exhaust in Exhaust Systems


I am well pleased with the system itself. This was actually a replacement under the warranty, and the previous system lasted seven years, here in the rust belt. Only complaint was the necessity of returning to manufacturer for inspection prior to receiving replacement. That meant my truck was down for about a month.



- MF15857
by:

Review from a similar Catback Exhaust in Exhaust Systems


nice and growly sounding, helpful tip spay some wd 40 on ends before fitting together, helps to slide the parts together easier.



- MF15356
by:

Review from a similar Catback Exhaust in Exhaust Systems


I believe it is the best exhaust on the market for this application. only thing is the exhaust tip needs bent down more as it touches the body and will melt plastic.



- MF16520
by:

Review from a similar Catback Exhaust in Exhaust Systems


Not a direct Fit Sounds good but had to modify rear brackets and drill holes in the frame to install on 09 F150 crew cab..not impressed with fitment or installation time..modification time caused loss of profit..



- MF16625
by:

Review from a similar Catback Exhaust in Exhaust Systems


Easy install, perfect fit on my 07 Tacoma. After computer reset, several miles, truck runs Awsome. Great seat of pants torque increase, combined with my Injen cold are intake truck is way quick and has much throatier note.



- MF16537
by:

Review from a similar Catback Exhaust in Exhaust Systems


I am so disappointed with this product ..i spend almost a grand and the sound of the exhaust is not good at all... I wish i can return this ...



- MF15333
by:

Review from a similar Catback Exhaust in Exhaust Systems


Excellent exhaust note through out the entire RPM range! Highly recommended this cat back system.



- MF15318
by:

Review from a similar Catback Exhaust in Exhaust Systems


Bought the magnaflow exhaust for my 2015 GMC. Everyone says how great it sounds. Price was good and easy to install.


Comments
Sounds great, with added preformanc. Couldnt be happier.
Ken z - 07/08/2017



- MF15327
by:

Review from a similar Catback Exhaust in Exhaust Systems


Easy to install sounds great I love the product it looks good too I'll try to get pictures up later



- MF16656
by:

Review from a similar Catback Exhaust in Exhaust Systems



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Ask the Experts about this MagnaFlow Exhaust Systems

  • Aftermarket MagnaFlow Exhaust for 2006 Pontiac Grand Prix GTX
    If your 2006 Grand Prix has the 5.3L LS4 engine, MagnaFlow offers a # MF16726 Cat-Back exhaust system that will work great for you. The exhaust system will definitely give you a more aggressive sound when under throttle. If you do a Google search on 'MagnaFlow on 2006 Pontiac Grand Prix' you can hear some sound clips so you can hear the difference between the stock. and the MagnaFlow exhaust. If you click the provided link, you can see an install video showing the # MF16726 being installed...
    view full answer...
  • MagnaFlow Cat-Back Exhaust for a 2005 Pontiac Grand Prix
    If your 2005 Pontiac Grand Prix has the dual exhaust and the 5.3 liter V8 engine then the MagnaFlow cat-back exhaust # MF16726 will fit. Take a look at the video I have included that shows a typical installation. That is actually my car in the video. If your Grand Prix has any other engine or exhaust configuration this kit will not fit.
    view full answer...

Do you have a question about this Exhaust System?




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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Zack K
Video Edited:
Zack K
Employee Rick A
Test Fit:
Rick A
Employee Patrick B
Video by:
Patrick B

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