Question about 2005 ATK 450 Enduro

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Dirtbike eahaust pipe comprison -which is best

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I know there were a few different models: X440S only FMF Powercore aluminum silencer/stainless header combo E440/C440 standard header/silencer with midpipe attached (long can) (2 spark arrestors) S440 standard header/shorty silencer with seperate midpipe (1 spark arrestor) X440 standard header/silencer (NO spark arrestors) Just wondering whether anyone has ever done any hp tests between these. From my experience the X440 can would flow the best because of the lack of spark arrestors but I'm wondering how the FMF powercore compares? The FMF has shorter header runners leading to the merged portion so the shorter header should deliver more low end torque. Also do I have the S440 can info right, only 1 spark arrestor in the shorty?,The so-called S440 pipe did not have a separate midpipe. It had a fixed welded inlet, same as the longer can, and was full open. Also, I have a New 03 X440 here with the SAME exhaust, ...but another with a long and full-open version. So, you really cannot tie all exhaust versions to a particular model, since too many owners will get confused. Everybody would need to check their own machine to be sure. But if ANYBODY out there has a separate midpipe?, I'd really like to confirm wazzup -- Up until now, I have thought that the only ones around are from the small batch that I had found over in Holland. And, on just a few bikes that were assembled in Europe just prior to the bankruptcy. ,,,

Posted on Nov 10, 2008

  • lt5luke
    lt5luke Feb 02, 2012

    You could always look at the Enduro Engineering Spark Arrestor End Caps instead of getting a whole new system:
    http://www.enduroarmor.com/spark-arresto...

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