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General Category >> Rubber Side Down! >> Actual muffler inlet diameter
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Message started by Greg on 08/16/14 at 14:38:35

Title: Actual muffler inlet diameter
Post by Greg on 08/16/14 at 14:38:35

I didn't see anything listed in the tech reference. I am wondering what the actual inlet diameter of our muffler is. Or the actual OD of the header. I don't have digital calipers or micrometers. I do know 1.75" is a little big. I am thinking somewhere around 42 or 43mm.

Title: Re: Actual muffler inlet diameter
Post by Srotag on 08/16/14 at 15:39:04

Header pipe connection surface is 1-11/16 measured with old mic. :)

Stock muffler ID is a little hard to measure due to the way it is constructed, but it was tight on the header so I'm going to say 1-3/4

What HD calls 1.75 is a bit larger and takes the extra cuts and can piece as shown in mods to work well.

Happy with mine... :)

Title: Re: Actual muffler inlet diameter
Post by Greg on 08/16/14 at 18:19:06

Thanks. I suppose old school micrometers work too. :)

I have a Dyna muffler on it now. I've had a lot of different ones on there. I am thinking of something different this time.