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Looking for most power from a full system exhaust for 400ex.

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  #11  
Old 06-18-2004 | 01:50 PM
Yellow650Rincon's Avatar
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Default Looking for most power from a full system exhaust for 400ex.

I think he is probably just going to use the Curtis Sparks X-6 system with either a 426 or 440 kit. Someone told him that was one of the best systems, and the guy that told him knows his stuff.
 
  #12  
Old 06-18-2004 | 02:05 PM
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Default Looking for most power from a full system exhaust for 400ex.

I am new to this but have some friends that own some of the top shops and they said to go with the Curtis Sparks system, that is what I am going with.... These people race and win... so lets hope they are correct.
 
  #13  
Old 06-18-2004 | 02:18 PM
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Default Looking for most power from a full system exhaust for 400ex.

which pipe x-4 or x-6
 
  #14  
Old 06-18-2004 | 05:04 PM
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Default Looking for most power from a full system exhaust for 400ex.

the x-4 is more designed for a stock internal motor. the x-6 is better with internals. after seeing both perform, i would get the x-4 if the most you will ever do is put in a drop in cam and a piston. if your going really radical on the cam, piston, or stroke it, i would probably get the x-6.
 
  #15  
Old 06-18-2004 | 05:55 PM
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Default Looking for most power from a full system exhaust for 400ex.

I would go to dirtwheelsmag.com, then click on latest news and like... number 43 i think it is, is a 400ex pipe shootout, they picked the White Brothers E-series for the winner, also a good is the CT Racing, if you like loud pipes, Also one that i dont think they tested is the Sparks Racing x-4 or x-6, if you wanted to pick between the HMF and Sparks, you should go with Sparks.
 
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