Exhaust decisions... Corsa vs Magnaflow 12909 - '16 Denali

Discussion in 'Performance' started by bamachem, Jul 7, 2019.

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  1. bamachem

    bamachem TYF Newbie

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    So, I've read about 50 posts on various exhaust setups and watched about all the videos I can find for 6.2L 2015+ GM truck exhausts.

    My 16 Yukon Denali XL has the stock exhaust with the flapper bolt mod. I want to add a set of black tips similar to Corsa, but also want to get a better tone.

    Options:

    I found a deal on a corsa exhaust under $900 delivered plus $100 gift card. Install and hope it's not louder than I want.

    Borla GM - maintains the flapper and may be too quiet, and extra $ for the tips.

    Borla - no flapper but still have to buy the tips

    Magnaflow 12909 muffler swap, but adding the dual side-exit tip means deleting the resonator as well. Will it drone or be too loud if i do both? Thinking about deleting the flapper too if i do a muffler swap.

    I like the sound/tone of the magnaflow videos I've found, but afraid deleting both the flapper and the resonator will lead to issues.

    I like the price on the corsa kit, but afraid it will be too loud for me (but I am running 33 MTs so noise isn't going to bother me too much).

    I'm not really considering the Borlas right now even though I run some on my 72 K5 Blazer and live the sound/tone.
     
  2. CMoore711

    CMoore711 Full Access Member

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    Based on your post and what you've described I'd go with the on the Corsa system you found with the black tips. Worse case is if after driving it for a while you feel it's too loud, you can always add a vibrant resonator back into the system and lower the sound level without losing the great tone the Corsa muffler provides.
     
  3. Big Mama

    Big Mama Full Access Member

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    Exhaust preferences really vary based on taste. The Corsa system seems to fit your need. Did you listen to resonator delete videos?
     
  4. 08HoeCD

    08HoeCD "Prolly" is not a real word

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    Go Corsa if you like it raspy; Magnaflow or Borla if you like it deep & smooth.
     
  5. bamachem

    bamachem TYF Newbie

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    The corsa system was just too cheap to pass up. Should be here today.
     
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  6. mbp1979

    mbp1979 Full Access Member

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    I love mine sounds so good on a cold start. You didnt go wrong
     
  7. TooMuchTxn

    TooMuchTxn Full Access Member

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    I've had the Corsa on my supercharged 5.3 and i love the rasp but its a little too loud under load for my daily. It is def tame sounding if your light on the foot BUT the cold start is so freaking loud that ive had my neighbors make comments a couple times. It quiets down after a few seconds but wow. It blasts on startup. I have a vibrant resonator sitting on my work bench just have to make an appointment to get it installed.
     
  8. bamachem

    bamachem TYF Newbie

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    So installed the Corsa yesterday. Easy job.

    I started it up with nothing after the Cat to see what it would sound like. A lot quieter than I expected.

    After install, I took it for a 70-mile round-trip to the beach. Overall I like it but not loving it. Quiet when light on the pedal and wakes up when I get on it. However, the cold start is just about obnoxious. It's not much different at idle once warmed up compared to my OEM exhaust with flapper mod to be honest, but it's WAY different on the cold start and at low speed in the neighborhood. Not sure I'm going to keep it. May have to swap over to Magnaflow to be honest. The tone isn't as deep as the OEM and it's definitely more "raspy".
     
  9. CMoore711

    CMoore711 Full Access Member

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    Before you take it off look into adding a vibrant resonator into the exhaust system, not only will it reduce the "raspiness" it will also reduce the sound level some, especially on the cold start.

    There's a couple videos in this thread here that will give you an idea of a before and after cold start sound level on adding in a vibrant resonator.

    https://www.tahoeyukonforum.com/threads/corsa-muffler-replacement.111623/#post-1353136
     
  10. 08HoeCD

    08HoeCD "Prolly" is not a real word

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    Corsa sounds like NASCAR to me---that's fine for a 'racer' but seems way out of place on a Tahoe/Suburban/Yukon. :confused:
     

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