Double checking compatibility with Sportster Mufflers

[Lastwachter]

These sportster mufflers are available to me for free. From what I have read they will work on my 78 GL1000 without having to rejet. Can someone tell me what that hole is on the side of the muffler and if anyone knows of any issues I would having using these and following the how-to instructions on this page?

Thanks!

[dingdong]

They are the same mufflers I have on my 76. I love them and they work well with no carb mods needed. As for the holes, most folks just weld a plug in there. I actually used them and built a crossover pipe for mine. At the time, 11 years ago, I thought it was needed because of the original design but it isn't. Just plug them and you will be okay.

[SnoBrdr]

They are the same mufflers I have on my 76. I love them and they work well with no carb mods needed. As for the holes, most folks just weld a plug in there. I actually used them and built a crossover pipe for mine. At the time, 11 years ago, I thought it was needed because of the original design but it isn't. Just plug them and you will be okay.

Did you run the adapter from the header to the pipes themselves or did your's fit right on ?

[dingdong]

I used an adapter for mine. If I remember correctly it was just a length of 1 3/4 exhaust pipe. The length of the adapter was determined by the positioning of the crossover. As I stated most folks don't use the crossover so exact length isn't critical.

[Lastwachter]

Great. Ok, Ill get a hold of the mufflers. Have the holes welded up. Then grab two 1 3/4" exhaust joiners (pipe and clamps) and finally create a bracket to attach it to the frame.

Thanks for your help guys. Ill be sure to post pics once I get that done.

[SnoBrdr]

Great. Ok, Ill get a hold of the mufflers. Have the holes welded up. Then grab two 1 3/4" exhaust joiners (pipe and clamps) and finally create a bracket to attach it to the frame.

Thanks for your help guys. Ill be sure to post pics once I get that done.

I just read another post, elsewhere, and it was said that the guy used a 1 7/8 x 2 OD adapter.

Guess you should measure them 1st.

[dingdong]

Great. Ok, Ill get a hold of the mufflers. Have the holes welded up. Then grab two 1 3/4" exhaust joiners (pipe and clamps) and finally create a bracket to attach it to the frame.

Thanks for your help guys. Ill be sure to post pics once I get that done.

I just read another post, elsewhere, and it was said that the guy used a 1 7/8 x 2 OD adapter.

Guess you should measure them 1st.

That's probably more accurate as I think I had to have the 1 3/4 flared a bit. I think auto supplies have adapters that might fit.