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Thread: new crazy exhaust

  1. #1
    Join Date
    Jan 2007
    Location
    Mtn. view missouri
    Posts
    1,745

    new crazy exhaust

    on page 430 of the offroad 2007 dennis kirk there is a pro circuit t-4 pipe with DUAL mufflers and header has any one got a picture or seen this
    Brad Harrell #927
    www.oxcracing.com

    08 yz250f

  2. #2
    Join Date
    Jul 2002
    Location
    Jackson NJ/Daytona Beach FL (school)
    Posts
    1,216
    dual exhaust is common on quads with V-twin or 2 cyl configurations.

    some people argue that duals are even ideal for a single cylinder application.

    On a V-twin it's a great idea, but IMHO on a single cyl it will provide minimal performance gain over a properly fabricated single exhaust.

    the whole idea of dual exhaust is for the pipes to crossover into one another and promote scavenging (i.e. the exhaust gases ability to escape the piping). with a proper merge, additional scavenging will actually suck the gases out of the piping for additional power!

    yes, you can have duals without this, but without the pipes merging , horsepower is being left on the table.
    Respect is earned, never given.

    2002 250ex- SOLD.

    Creator of the 250EX Performance FAQ. For 250ex headwork and various porting , please email me at flyinryanporting@gmail.com

  3. #3
    Join Date
    Mar 2007
    Location
    Massachusetts
    Posts
    1,622
    i think it wud look sick with two mufflers.iv always liked them over singles plus they sound better

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