3.5 inch cat back $130 dollars.

Discussion in 'Performance' started by NORCAL SS, Mar 7, 2012.

Sponsored By: Black Bear Performance
  1. NORCAL SS

    NORCAL SS SUV SUSPENSION GURU Supporting Vendor

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    Guys i cut off the resonator on my escalade and left it turned down and replaced the main muffler with a magnaflow 12909. The stock exhaust is 3.5 inches from cat back so by far best way to spend your money.

    12909.jpg

    muffler you can see thru
    2012-02-28_115031.jpg

    installed
    2012-02-28_172957.jpg


    NOTE--- you will need to get about 2 inches of straight 3.5 inch pipe. You can cut the portion before or after the resonator and weld that on the pipe coming into the muffler so everything will fit in.


    And here goes the stock muffler you can't even see light thru it from other side
    2012-02-28_173715.jpg
    2012-02-28_173748.jpg



    Now on these mufflers takes about 1 month to break in fully. So far the truck has got louder and no real noise inside. Sounds great!!!

    Also I did notice a gain on hp when we stomped on the gas. My main concern also is that all the aftermarket cat back exhausts for these trucks are 3 inches and like 600-1000 dollars and stepping from 3.5 to 3 inch is not the best at all.

    Save your money and make more power by doing this set up.


    http://www.youtube.com/watch?v=I_E5417xFVo
     
    Last edited: Apr 11, 2012
  2. Flowmini98

    Flowmini98 Member

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    I like..just did something similar on my Tahoe and got to see the same restrictive factory muffler shots in person. Im very happy with the way mine turned out as well.
     
  3. westray

    westray TYF Newbie

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    Nice setup and money well spent

    Looking to do the same thing
     
  4. quattrotman

    quattrotman Full Access Member

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    Did the exact same thing on my EXT and I'm loving it. Can't really understand why anyone would spend $500++ on a cat back when it's pretty much the same thing. Even the magnaflow cat back is big $$ and it is exactly this setup but comes with a tip.
     
  5. robdeniro0

    robdeniro0 Full Access Member

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    Tony i bought the 12909 muffler because it had the 3.5 in and out but i see the factory muffler is offset on both ends where the magnaflow has a center as well as an offset outlet, so this is not a exact swap. I would need to change the whole piping underneath? Oh i have the 10 denali by the way.
     
  6. NORCAL SS

    NORCAL SS SUV SUSPENSION GURU Supporting Vendor

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    yeah i know 500 for pipes that SMALLER than stock

    Its a bolt in deal pretty much. You will need about 2 inches of the 3.5 pipe which you can get from when you cut the resonator off and you put the muffler at a angle like we did. i have a 2011 escalade and works fine.
     
  7. yukon denali 2007

    yukon denali 2007 Member

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    so i just cut 2 inches from one of the muffler sides to fit it directly?

    good job man
     
  8. NORCAL SS

    NORCAL SS SUV SUSPENSION GURU Supporting Vendor

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    Cut the oem muffler as close as you can to the entry/exit holes

    cut the pipe before resonator and ditch resonator.

    Trust me wont be loud
     
  9. metal4all6

    metal4all6 Member

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    I ordered the same muffler, but quickly cancelled after I noticed the same issue with the offset. I wish this was posted a few months ago :). I would have gone this route instead of the MBRP catback.
     
  10. NORCAL SS

    NORCAL SS SUV SUSPENSION GURU Supporting Vendor

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    yeah guys dont waste your time. Its one step louder and for us is perfect. Im doing long tube headers for better performance/gas mileage im sure it will sound even better after that.
     

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