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Thread: Magnaflow cat-back exhaust review

  1. #1
    Jr Member crazycanuck's Avatar
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    Default Magnaflow cat-back exhaust review

    I installed a Magnaflow cat-back exhaust one week ago today, and here are my findings.

    Sound

    As many of you know, this exhaust isn't the obnoxiously loud ones you hear on the street. Idling, it's not that much louder than stock other than the occasional rumble. On the highway, you can barely hear it while cruising. I am the lone car enthusiast among my group of friends, so having an overly loud exhaust will have them shy away from me giving rides.

    The sound really comes on in first gear; indeed giving the entire engine a deep mellow tone. As if the car is purring; I can't begin to describe how beautiful it is to my ears. Switch to second, and the tone mellows out even more and drones on at 2500 RPM. Let go off the pedal and the sound gradually disappears. If you drive a stick (I don't), you can really get creative and create some music with this exhaust.

    The above being said, don't get the false impression that this exhaust is a wimp compared to the other competitors. It will let you know it's there at all the right moments. I realized how loud it is when driving through a tunnel. The whole tunnel filled with my exhaust sound, and did it ever sound sweet. It took me a while to clue in that it was my car. To the untrained ear, you can easily mistake it for a higher end car. Yes, a higher end car, not a modded shitbox. Same goes for underground parking lots!

    Power

    Given the recent heat in the past week, I can't give a clear definition of power. I often find my engine struggles to keep the wheels turning under extreme heat. There are on and off times when the car is quite light on its feet (at night), and other times when I really struggle to accelerate (rush hour in 33+ heat). Overall however, I do believe performance has increased.

    I have an intake already, and the dead spot between 1st and 2nd was already reduced. Now there is virtually none. It goes from 1st to 2nd with no trouble, and I can keep the car in 2nd until 60km/h without feeling the engine breaking hard. Once you hit high speeds, the extra HP gain definitely helps out and I often forget I'm hitting 140 since it just slides into that speed so easily.

    Fuel consumption

    So there has been lots of talk about hi-flow exhausts, and straight pipes reducing back pressure; therefore reducing the amount of work the engine needs to do to pipe the exhaust fumes out. Less work means less fuel.

    Maybe it's the way I drive when I get a new mod, but I haven't noticed a big gain in fuel efficiency. Granted, there are times when I ride 2nd all the way into 100 just so I can hear the intake + exhaust. And granted I tend to accelerate hard just so I can get a feel for the car. But nothing too excessive, and definitely no where near all the time.

    I average about 450 - 550 KM per tank depending on how many times I start the engine and how much highway I drive in a week. This week, I've been running around a lot, so I had to turn off and on my engine a lot of times. As well as driving city streets a lot more. It's not fair to say that the exhaust is not helping, since this week was just a bad test overall.

    HOWEVER, if I was to drive the way I did this week without the exhaust. I'd average around 400KM before I have to fuel up. But then again, there's a lot more factors to consider. There's nothing scientific about the way I test for fuel efficiency; take this with a grain of salt.

    Issues

    None so far, other than the huge amount of condensation I noticed under my car today when the A/C was blasting. My theory is that the exhaust fumes are hotter, and coming out faster; thus explaining the larger quantities of condensation. Feel free to chime in on this if you disagree. I personally didn't notice condensation at all driving around last summer.

    Conclusion

    Overall, I'd give this exhaust an A+! For all of you who want a well rounded sound, nothing rice sounding, nothing pretentious, civilized, pretty and affordable. This would be my recommendation.
    Mazda 3 2007 GX Sedan/Carbon Grey Mica | Falken 912 225/40/18 | RX-8 rims | AEM | Shark Fin |35% Tints| Eyelids | Red Calipers | Open mouth grille | Magnaflow cat-back exhaust | Eibach Pro-Kits | Apexcone HIDs 6000K |

  2. #2
    Sr Member Iceman_F1's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    I'd love to hear this exhaust one day. I don't like a lot of noise coming from the car, specially the modded ones you see all around...but if it's as mild as you said, it might interest me

  3. #3
    Sr Member Nextmod's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    I have one instock right now if anyone wants to see it I can bring it to a meet if its not sold yet
    www.nextmod.com
    Monday - Friday 12-8pm
    Saturday 12-5pm

    290 Yorktech Dr. Unit 27 Markham Ontario email me at Jon@nextmod.com
    416-800-9139

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    Default Re: Magnaflow cat-back exhaust review

    Great writeup! Thanks for the info!

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    Jr Member crazycanuck's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    http://vupload.facebook.com/video/vi...v=639482739582

    If you guys have facebook, try to see if you can view this video.

    It's off my phone so the quality aint great, but you get an idea of the sound to expect.

  6. #6
    Sr Member Nextmod's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    I have to place another order with them so if anyone else interested let me know =)

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    Default Re: Magnaflow cat-back exhaust review

    On the 3i ... Doing 120+ on the highway sits you at 3000+ RPM, so you get a slight slight slight drone that can be easily drown out by setting volume >= 14

    I've also been doing weekend trips to London (220 KM clocked). I would fill up to 100% (gas pump stop), and before the intake + exhaust, I was left with 9/16 of a tank @ 120 on cruise. Doing the trip after I installed my intake + exhaust gave me over 10/16 on gas @ 120 on cruise.

    I bet the economy would be better if I could bear to drive @ 100.
    Last edited by M3Nick; 08-25-2008 at 11:21 AM.

    [ Mazda 3 GS Black Mica ] [ Current: Prolumen 6000k | Magnaflow CAT-back | Fujita CAI | Eibach Pro-kit | 20% Tint | Sumitomo HTR ZIII's | Black Calipers | White/Blue LED Dash | Stubby | Fogs | Supertones | TB Ground ]

    ... Zoom-zoom is the sound of my money flying out of my wallet ...

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    Sr Member Nextmod's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    if anyone is interested let me know I have a special price

  9. #9
    Noob randy_vous's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    Just got the Magnaflow installed on my 2008 Mazda3 sport GT and I love the sound. You have a great description. The sound is not obniousxly loud but a low tone purrrr. In fifth gear the sounds melows out above 2.000 rpms so it's nice and quiet on the highway...

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    Ass Raver 6strings's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    Might be a dumb question, but does this exhaust keep the second cat?
    I'll put down all my mods here so people will know how cool I am!

  11. #11
    Newbie Drozdy's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    Quote Originally Posted by 6strings View Post
    Might be a dumb question, but does this exhaust keep the second cat?
    yep, well mine is still there

  12. #12
    Ass Raver 6strings's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    can anybody else confirm, i read on a thread that the magnaflow gets rid of it.

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    Default Re: Magnaflow cat-back exhaust review

    Gah I cannot wait to get mine installed!

  14. #14
    Jr Member Punkrockjohn's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    I've had mine for about 2 weeks now, I absolutely love it
    2008 Copper Red Mazda 3 GS

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    Ass Raver 6strings's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    WHat do you guys think about removing the resonator?

  16. #16
    Sr Member mazdaskit's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    Quote Originally Posted by 6strings View Post
    WHat do you guys think about removing the resonator?
    the one that magnaflow gives you?? or when you take out the 2nd one on the stock exhaust
    2007 Mazda 3 GS Carbon Grey

    Mods to date: 8000K HID, 3000K HID Fogs with smoked tint, Angel Eyes, Eye Lids, Smoked LED 3rd Break Light, Led Interior Lighting, Open Mouth Grill, Front Lip, Rear Flares, OEM Side Skirts, Custom Black Emblems, TM3 License Plate Covers & Rear TM3 Stickers, 2-way Viper Alarm, 23% Tinted Windows, Black Reflectors, 3M Carbon Fiber Vinyl, Eibach Pro Kits, Smoked Side Marker, Tinted Rear Tails, VG shark fin, Hella Horns, 18" Tenzo Type M Version 1 Black wrapped with 225/40/18 Nankang NSII, RHO Plate, Magnaflow CBE

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    Ass Raver 6strings's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    The one magnaflow gives.
    I thought stock only had one.

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    Ass Raver 6strings's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    After furthur reviewing.. the exhaust deletes the second cat.

  19. #19
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    Default Re: Magnaflow cat-back exhaust review

    Just got mind installed this weekend and I absolutely love it! Nothing too crazy just perfect

  20. #20
    Jr Member zakman's Avatar
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    Default Re: Magnaflow cat-back exhaust review

    kinda wish i went with this or the borla when i got my mazdaspeed accessory one. not that it hasnt been great but the welds are giving way 3 years into owning it

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    Default Re: Magnaflow cat-back exhaust review

    Quote Originally Posted by Nextmod View Post
    if anyone is interested let me know I have a special price
    What is the special price?

  22. #22
    Jr Member -ToM-'s Avatar
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    Default Re: Magnaflow cat-back exhaust review

    Quote Originally Posted by Brian Mills View Post
    What is the special price?
    +1
    2007 Mazda 3i ~ 2.0 ~ Silver ~ Manual ~ 17% Tint all around ~ Footwell lights ~ 18" GP Racing GR5 ~ Smoked side markers & reflectors ~ 8000k HID ~ Vmaxx Coilovers ~ VG Sharkfin ~ CorkSport Skidplate

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