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New M8 header
#11
02-24-2021 | 08:26 PM
It`s Harley's "hi-flow" cat/header pipe
I've done a ton of research on this part and the exhaust header that comes with the 131 kit is Harley's "hi-flow" version.
It technicaly has an HDI part (Harley Davidson International) number.
The European emmission standards are different than here and a higher flow catalytic converter is used, which is why it's included with the 131 kit (instead of just using the stock one). If you see them side-by-side; at first glace they look the same, but the cats are different lengths.
Whether it's a big help or not, it is less restrctive than the US version we all have.
I just had a Stage II done on my 114 (it's still in the shop) and picked up one of these headers (to stay in warrantee) installed. Hopefully it makes a bit of a difference....
It technicaly has an HDI part (Harley Davidson International) number.
The European emmission standards are different than here and a higher flow catalytic converter is used, which is why it's included with the 131 kit (instead of just using the stock one). If you see them side-by-side; at first glace they look the same, but the cats are different lengths.
Whether it's a big help or not, it is less restrctive than the US version we all have.
I just had a Stage II done on my 114 (it's still in the shop) and picked up one of these headers (to stay in warrantee) installed. Hopefully it makes a bit of a difference....
#12
02-25-2021 | 12:32 AM
Seasoned HDF Member
Joined: Dec 2012
Posts: 6,452
Likes: 431
From: Orange County
I've done a ton of research on this part and the exhaust header that comes with the 131 kit is Harley's "hi-flow" version.
It technicaly has an HDI part (Harley Davidson International) number.
The European emmission standards are different than here and a higher flow catalytic converter is used, which is why it's included with the 131 kit (instead of just using the stock one). If you see them side-by-side; at first glace they look the same, but the cats are different lengths.
Whether it's a big help or not, it is less restrctive than the US version we all have.
I just had a Stage II done on my 114 (it's still in the shop) and picked up one of these headers (to stay in warrantee) installed. Hopefully it makes a bit of a difference....
It technicaly has an HDI part (Harley Davidson International) number.
The European emmission standards are different than here and a higher flow catalytic converter is used, which is why it's included with the 131 kit (instead of just using the stock one). If you see them side-by-side; at first glace they look the same, but the cats are different lengths.
Whether it's a big help or not, it is less restrctive than the US version we all have.
I just had a Stage II done on my 114 (it's still in the shop) and picked up one of these headers (to stay in warrantee) installed. Hopefully it makes a bit of a difference....
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MotoJockey (02-25-2021)
#13
02-25-2021 | 11:41 AM
https://www.hdforums.com/forum/milwa...ng-header.html
I believe it might be this. Go to #9 in the post. It says this
There are only two different OEM headers for the M8 Touring Bikes (2017 - 2020), no matter if 107, 114 or 117:
Part no. 65600176 für DOM bikes
Part no. 65600177 for HDI bikes
The HDI header has a longer CAT element, is more restrictive then the DOM header and is also part of the new 128/131 Stage IV kits.
I believe it might be this. Go to #9 in the post. It says this
There are only two different OEM headers for the M8 Touring Bikes (2017 - 2020), no matter if 107, 114 or 117:
Part no. 65600176 für DOM bikes
Part no. 65600177 for HDI bikes
The HDI header has a longer CAT element, is more restrictive then the DOM header and is also part of the new 128/131 Stage IV kits.
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