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06 streetrod exhaust

Discussion in 'Motorcycle Tech Talk' started by cranker, Apr 28, 2007.

  1. cranker

    cranker New Member

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    has anyone drilled the end caps of the mufflers for better sound, and if so does it harm anything else?
    cranker, Apr 28, 2007
    #1
  3. Slimjim

    Slimjim Active Member

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    I had the stock mufflers drilled out until I knew what pipes I wanted. They just ran a large drill bit up the tail pipe and they sounded much better. In fact, I liked the sound of them better than what I have now. When that was done, I also installed a high flow air filter and had a new down load to the ECM. It is not advisable to increase the flow in the exhaust without balancing the input.
    Slimjim, Apr 28, 2007
    #2
  4. chucktx

    chucktx Moderator Staff Member

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    this is what i have done to mine.......06 eg....k&n airfilter for stock cleaner....6 extra 5/8 holes in back and bottom of aircleaner for more air...jetted the carb...mufflers....remove and drill out inlet end 15/16.......reinstall and start drilling out exhaust end a little at a time....keep checking plugs and milage....i ended up with 5/8 hole in exhaust end....ya got to keep some backpressure for preformance.......your milage may vary....that being said, when i do go with slipons it will be trapps....but this will have to do for now....
    chucktx, Apr 28, 2007
    #3
  5. cranker

    cranker New Member

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    Thanks for the info.. Shaun
    cranker, Apr 29, 2007
    #4
  6. cranker

    cranker New Member

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    thanks for all the info ... Shaun
    cranker, Apr 29, 2007
    #5

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