I am trying to do a spot on correct restoration of a 1972 FLH Shovelhead and I can't tell if the correct muffler part number is 65244-70A or 65242-70B.


Do I need an A and a B for left and right? Which number is correct?


I have also heard that the B might be an ultra quiet version?


Any insights people can provide would be hugely helpful and much appreciated.

 

My parts book shows only these

65242-70B extra quiet muffler (70-77 FLH)

65242-78B chrome muffler (78-* FLH)

 

Thanks for the reply. I thought the 242 was the correct one until today when I saw the 244 on eBay. Do you know if I buy two of the Bs? A and B isn't a side of motorcycle thing is it?


Again thanks for checking the parts book.

 

 

part number same on both sides?

 

Part number not visible on the other side just HD MOCO Inc. I seriously doubt there's a different part number as there doesn't appear to be a reason for it. Mufflers are attached via round hangers that slide onto the mufflers so I wouldn't think there is a right or left. Looked in my parts book and confirmed numbers Panz came up with. IMO the B is the extra quiet and you could use either the 65242-70 or the 65244-70 and decide whether you want the standard or extra quiet.

 

Hi guys
appreciate this is a really old thread...

I stumbled across it the other day searching for similar info and thought others may be interested in what I have

I have a 1972 FLH with a build date of September 1971

it had some aftermarket pipes on it, but came with some original exhaust parts including mufflers

One muffler is a 65244-70B and has an outlet size of 1inch

Other is a 65244-70A and has an outlet size of 1 3/4 inch

They are the same length and have the same diameter inlet I have made the assumption B is for the right side and A is for the left side

I went with a single system and fitted the B muffler and yes, it's quiet

I couldn't find these numbers in the parts book either but they do look like the mufflers in the book

Cheers