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Thread: DynoMax 2012-Up JK Evolution Competition Exhaust System Installation Write-Up

  1. #1
    Administrator wayoflife's Avatar
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    DynoMax 2012-Up JK Evolution Competition Exhaust System Installation Write-Up



    If you're looking for an awesome new exhaust system for your 2012-up Jeep JK Wrangler, you really need to look no further than DynoMax. Their new Evolution Competition Exhaust System requires no welding, provides better clearance, is very affordable and most important of all - sounds great! And, as you can see in this write-up below, the whole thing is super easy to install and can be done in about an hour using basic tools.

    What you'll need:
    Dynomax Evolution Competition Exhaust System
    • 15,16mm (or 5/8") Sockets & Wrenches
    • Ratchet
    • WD40 or similar lubricant
    • Large Prybar
    • Grinder with Cutting Wheel (optional)

    Here's a shot of the DynoMax 2012-Up JK Evolution Competition Exhaust System and all the parts you'll get with it.
    http://www.amazon.com/Dynomax-39516-...t+jk+evolution


    1. Using a 15mm wrench, loosen the clamp bolt securing the factory exhaust pipe to the muffer as shown...


    2. Using a 15mm wrench, loosen the clamp bolt securing the factory exhaust pipe to the Y-Pipe as shown...


    3. Spray some WD40 or similar lubricant on all 4 rubber exhaust hanger isolators. There are 2 in the rear on either side of your muffler...




    There's one along the frame rail just forward of the muffler...


    And, there's one between the resonator and Y-pipe as shown...


    4. Use a large pry bar to separate the muffler from the rubber exhaust hanger isolators...




    5. Pull on and work the muffler back and forth until it separates from the exhaust pipe. Remove and discard the factory muffler...


    6. With the muffler removed, use a large pry bar to separate the exhaust pipe from the remaining 2 frame rail exhaust hanger isolators...




    7. Pull and work the exhaust pipe and resonator back and forth until it separates from the Y-pipe. Remove and discard the factory exhaust system..


    8. Using a 16mm socket, loosen the 2 bolts securing the forward edge of your EVAP skid plate to the cross member as shown...


    9. This may not be the case anymore but, I got an early kit and, while the exhaust hanger bracket that's provided with the kit would work as is, I wanted mine to sit flush and to do that, a little clearancing was needed. If you too got an early kit and wish to do the same, you can start by removing the bolt closest to the driver side frame rail. With that removed, use a grinder to cut the skid plate lip and level it out...


    This is what it should look like when all is said and done...


    10. Take one of the stepped clamps provided and slip the narrower end onto the end of the factory Y-pipe as shown...


    11. Install the DynoMax intermediate pipe onto the end of the factory Y-pipe making sure that the welded exhaust hanger is pointing toward the frame rail...


    12. Push the new intermediate pipe all the way on and then connect the exhaust hanger onto the factory isolator...


    13. Using a 16mm or 5/8" socket, secure the clamp in place...


    14. Remove the remaining EVAP skid plate bolt, place the new exhaust hanger provided with the kit on top of it making sure that the pin is pointing toward the driver side frame rail and then, loosly secure everything back in place using the 2 factory bolts...


    15. Slip the remaining stepped clamp onto the intermediate pipe and then install your new DynoMax exhaust onto it as shown...


    16. Slip the remaining smaller clamp on the end of the exhaust and then, install the exhaust tip onto it so that the opening is pointing downward...


    17. Install one of the factory exhaust hanger isolators that you removed earlier onto the pin of the new cross member hanger provided and onto the exhaust tip as well as shown...


    18. Using a 16mm socket, tighten down the 2 evap canister skid plate bolts...


    19. Using a 16mm or 5/8" socket, secure the exahust tip clamp in place...


    20. Peel off the clear plastic protector from the exhaust and you're done...


    Start up your engine and enjoy the sound and performance of your new DynoMax JK Evolution Competition Exhaust System.

    DynoMax 2012-Up JK Evolution Competition Exhaust System Sound Clips


  2. #2
    Living the WAYALIFE MTG's Avatar
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    Very cool!

    Couple of questions:

    1) how much space between the evap skid and the exhaust? Will there be enough room if you have moved your evap skid over 2" to avoid the factory rear DS.
    2) should you have a CAI if you run this?
    3) how's it sound?

  3. #3
    Living the WAYALIFE MTG's Avatar
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    Something I said?

  4. #4
    Administrator wayoflife's Avatar
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    Quote Originally Posted by MTG View Post
    Very cool!

    Couple of questions:

    1) how much space between the evap skid and the exhaust? Will there be enough room if you have moved your evap skid over 2" to avoid the factory rear DS.
    2) should you have a CAI if you run this?
    3) how's it sound?
    1. plenty of space. the exhaust sits in the same place as the resonator and, while it is a bit bigger, it's not so much that it should be a problem. i will try to take better pics of this area.
    2. nah, in reality, unless you run both a CAI and headers, the performance gains from an exhaust like this is nominal at best.
    3. sounds awesome and hoping to get a sound clip of it today

    Quote Originally Posted by MTG View Post
    Something I said?

  5. #5
    Old Timer GCM 2's Avatar
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    Love it!

    Quote Originally Posted by MTG View Post
    Something I said?
    Quote Originally Posted by wayoflife View Post
    I think MTG was expressing a "passive aggressive" style in order to receive a suitable response in a timely fashion

    Gotta love that Dynomax look and sound! Nice little upgrade to the 'Cat.
    2009 Black Rubicon Unlimited
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  6. #6
    Administrator wayoflife's Avatar
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    Quote Originally Posted by GCM 2 View Post
    I think MTG was expressing a "passive aggressive" style in order to receive a suitable response in a timely fashion

    Gotta love that Dynomax look and sound! Nice little upgrade to the 'Cat.
    guess i'm a little slow this morning.

    sorry mtg - forgot to subscribe to this thread and i simply missed your post.

  7. #7
    Living the WAYALIFE MTG's Avatar
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    Quote Originally Posted by wayoflife View Post
    1. plenty of space. the exhaust sits in the same place as the resonator and, while it is a bit bigger, it's not so much that it should be a problem. i will try to take better pics of this area.
    2. nah, in reality, unless you run both a CAI and headers, the performance gains from an exhaust like this is nominal at best.
    3. sounds awesome and hoping to get a sound clip of it today
    Perfect! Thanks!


    Quote Originally Posted by wayoflife View Post

    Quote Originally Posted by GCM 2 View Post
    I think MTG was expressing a "passive aggressive" style in order to receive a suitable response in a timely fashion

    Hahaha!

    No really I thought 1) I had asked a dumb question or 2) was a ninja thread killer. Either way I thought it was something I said. Well, maybe just a hint of sarcasm in there.

    So this is why I was asking....

    The ARB compressor I have took a while to fill 4 35s, not awful but I can only imagine that the 37s are going to take that much longer. So I was thinking a tank would be nice to add at some point. I'm wondering if there would be a way to mount a tank in the spot where the stock muffler is located and use the ARB to keep it filled up.

    Plus I really don't like the raspy "ricer" sound of the stock '12s upon acceleration.

  8. #8
    Hooked nacho's Avatar
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    The 12's sound like a sports car with exhaust. I have the magnaflow comp exhaust on mine, looks about the same as the dynomax kit. Very quiet unless you are on the throttle in the upper RPM range
    never name your jeep after a women, eventually you will want to flip it over to take a look at the under carriage.

  9. #9
    Administrator wayoflife's Avatar
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    Quote Originally Posted by MTG View Post
    The ARB compressor I have took a while to fill 4 35s, not awful but I can only imagine that the 37s are going to take that much longer. So I was thinking a tank would be nice to add at some point. I'm wondering if there would be a way to mount a tank in the spot where the stock muffler is located and use the ARB to keep it filled up.

    Plus I really don't like the raspy "ricer" sound of the stock '12s upon acceleration.
    yeah, if not for the fact that i have dreams of an evo leaver in the back of rubicat someday, i've eyed that exact same area for a tank as well. i'm sure it could be done without too much fuss too.

    there is no ricer sound about this new exhaust.

    Quote Originally Posted by nacho View Post
    The 12's sound like a sports car with exhaust. I have the magnaflow comp exhaust on mine, looks about the same as the dynomax kit. Very quiet unless you are on the throttle in the upper RPM range
    agreed, sports car like. we just took a bunch of sound clips yesterday and hope to post something up today.

  10. #10
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    Okay folks, just added a sound clip to my original post but, you can see it here as well...




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