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Muffler fitment

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Old May 29, 2026 | 02:59 PM
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Default Muffler fitment

I picked up a set of mufflers from a 2019 sportster custom and was hoping that they would fit my 2008 lo. Anyone with experience with this please share. Thanks John

 
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Old May 29, 2026 | 04:07 PM
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You have 2 basic problems. Those mufflers don't have the balance pipe ports and secondly the o2 sensor ports are a smaller diameter than on your bike.

To make them work you would need the brackets from the newer bike and a way to fit 18mm o2 sensors in a 12mm hole.
 

Last edited by Andy from Sandy; May 29, 2026 at 04:08 PM.
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Old May 29, 2026 | 05:03 PM
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They do have the ports and I’m only wanting to change the slip ons
 
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Old May 29, 2026 | 06:04 PM
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There's one way to find out. It's not too difficult to change mufflers.

John
 
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Old Yesterday | 01:56 AM
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If they have ports then they are not from a 2019 bike which is very good news for you as they ought to fit on your bike if the rest of the exhaust system is stock.

I did make a stupid mistake as the O2 sensors are in the headers. So apologies for that.

I hope you can see here on the 2019 there is no ports but you can see on a 2009 they are there:-

2019


2008

 

Last edited by Andy from Sandy; Yesterday at 01:58 AM.
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Old Yesterday | 10:48 PM
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Actually the fellow I purchased them from didn’t seem too sure maybe guessed, but to me they looked correct. Not too bad of a project. Thanks for the advice
 
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