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Author Topic: 131” header pipe  (Read 274 times)

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Threephase

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131” header pipe
« on: April 30, 2021, 11:47:34 PM »

Does anyone know what is different about the catted header that comes with the 131” upgrade kit? I compared it to a stock head pipe and cannot tell a difference in appearance. Even the catalyst material inside looks the same. Same size O2 bungholes. Other than a different part number they appear identical.
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cvosjoe

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Re: 131” header pipe
« Reply #1 on: May 01, 2021, 06:45:54 AM »

Does anyone know what is different about the catted header that comes with the 131” upgrade kit? I compared it to a stock head pipe and cannot tell a difference in appearance. Even the catalyst material inside looks the same. Same size O2 bungholes. Other than a different part number they appear identical.
The head pipe in the Stage IV 131 kit is rated Euro4. There is more catalyst material inside the head pipe. It is more restrictive than the regular catalyst head pipe for US models.

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Threephase

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Re: 131” header pipe
« Reply #2 on: May 01, 2021, 10:06:23 AM »

So they are choking down the 131”  with a more restrictive catalyst. Their description of the header makes it seem just the opposite.
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cvosjoe

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Re: 131” header pipe
« Reply #3 on: May 01, 2021, 07:51:09 PM »

So they are choking down the 131”  with a more restrictive catalyst. Their description of the header makes it seem just the opposite.
There's no way the US head pipe would pass EPA standards because of the larger cubic inch engine. That's why the Euro4 rating. I used the head pipe from the kit in my build so I could retain the warranty.

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2019 FLHXSE Charred Steel/Lightning Silver
2018 FLHXSE - Totaled
2017 FLTRXS Wicked Red Denim
2017 FLHXSE - Traded
2015 FLTRUSE - Traded
2014 FLHTKSE - Traded
2013 FLHTCUSE8 - Traded
2012 FLTRXSE - Sold
2011 FLTRUSE - Traded
2009 FLTRSE3 - Traded
2005 FLHTCSE2 - Traded
2004 FXSTDSE2 - Traded
 

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