Stock exhaust header modification? - Road Glide Forums
Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 5 (permalink) Old 07-14-2019, 06:35 PM Thread Starter
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Stock exhaust header modification?

Hello everyone. This is my first forum topic, so first I just want to say thanks to everyone in advance for the information. I'm on my first RG, a 2018 that I bought last July. So far, its been a fantastic ride, especially coming off of a 2016 Wide Glide. Absolutely unreal difference.

Anyway, I've been reading a bunch of thread topics on exhausts and everyone seems to be either going cat-less, or gutting the cats in the stock exhaust. I haven't heard much of anyone putting on the SE full system yet, and I'm curious about that. I already know one of the answers is because not many folks are going to pay $1500 to get the same exhaust they already have from the factory. Just more exhaust coming from the left side, and less heat. However, my problem with this is that heat is just transferring to underneath the saddlebags, right? Which means that whatever is in the bags is on slow bake for the entire trip and definitely when you come to a stop light somewhere. That's just a theory...I may be totally off base with that. However, from the research I've done, it sounds like the heat reduction is also because there is an equal amount of exhaust coming from both sides, rather than just the right hand side, further scavenging hot gases from the combustion process. So, here's where I'm going with this. Has anyone thought of modifying the stock exhaust to more efficiently move the spent gases from both sides? I had an opportunity to look into the left hand side of the stock exhaust, and its simply a T-Joint, with part of the left hand side exhaust protruding into the existing pipe downstream of the cat. This is both restrictive and inefficient. Basically a modified 2 into 1 without any of the benefits of an actual 2 into 1. My thought is taking the stock system off, taking it to an exhaust company, and having a proper rounded pipe welded in place of the "squashed" exhaust pipe, and angled to catch spent gases rather than just T-Jointed.

Does this sound absolutely crazy, or does it have some relevance? My overall goal here is to make this bike comfortable for long trips. But right now that heat is unreal...especially for the girlfriend on the bike.
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post #2 of 5 (permalink) Old 07-14-2019, 09:15 PM
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I had the screaming eagle full exhaust put on my 18 and I'm very happy with it
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post #3 of 5 (permalink) Old 07-14-2019, 09:24 PM
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I had the screaming eagle full exhaust put on my 18 and I'm very happy with it
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post #4 of 5 (permalink) Old 07-14-2019, 09:25 PM
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the cats are in the mufflers on mine
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post #5 of 5 (permalink) Old 07-14-2019, 10:01 PM Thread Starter
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How is the heat on the bags? I'm actually a fan of catalytic converters. Most people think they are super restrictive, but that's actually a misconception. From a physics perspective, exhaust gases when super heated actually move faster than if they are allowed to cool inside the exhaust. It's only at very high rpm's that they become restrictive. At least its that way on cars/trucks. I'm relatively new to motorcycle modification, but in a car, I'm not sitting directly over a 500 degree catalytic converter, lol. I'm all for the full system, but I am concerned about the heat on the bottom of the bags.
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