Exhaust - Honda Rebel 300 & 500 Forum
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post #1 of 39 (permalink) Old 04-06-2018, 12:45 PM Thread Starter
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Exhaust

Pro-Race Gp Cone bolted on today.
Sounds better than I imagined, it's fairly loud but can be louder by removing the baffle or quietend by packing out the baffle with exhaust wadding!
I'm happy as is. I have the down pipe system on order to go CAT free. This will need engine remapping when fitted,
Should release a little more power & torque.
I will do a short YouTube video when I get a chance so you guys can have a listen.
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post #2 of 39 (permalink) Old 04-06-2018, 02:33 PM
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Should release a little more power & torque.
I think this assumption has been commonly debunked. The engine performance is generally tuned to work with the stock exhaust and when you change out the muffler/pipes you change that dynamic and even after re-mapping most people show they have a loss of power at high end, low end, or torque, or all of the above.

People will swear up and down they get performance increases but I've yet to see any real dyno testing before/after that would support this claim.
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post #3 of 39 (permalink) Old 04-06-2018, 02:45 PM Thread Starter
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My Honda dealer thinks it will do a little bit more but mainly a little moe torque. I'll be posting the DYNO test results once the cat has been removed!
You can tune most engines to a degre if you know what your doing. Most debunk posts are from people who don't know what they are doing
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post #4 of 39 (permalink) Old 04-06-2018, 03:30 PM
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Pro-Race Gp Cone bolted on today.
Sounds better than I imagined, it's fairly loud but can be louder by removing the baffle or quietend by packing out the baffle with exhaust wadding!
I'm happy as is. I have the down pipe system on order to go CAT free. This will need engine remapping when fitted,
Should release a little more power & torque.
I will do a short YouTube video when I get a chance so you guys can have a listen.
It looks a little unfinished. Are you going to paint it or leave it as-is?

2019 Honda Shadow Aero 750, 2017 Honda Rebel 500 (SOLD), 2018 Kawasaki Vulcan S 650 (SOLD)
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post #5 of 39 (permalink) Old 04-06-2018, 04:02 PM
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Originally Posted by Mike View Post
Pro-Race Gp Cone bolted on today.

Sounds better than I imagined, it's fairly loud but can be louder by removing the baffle or quietend by packing out the baffle with exhaust wadding!

I'm happy as is. I have the down pipe system on order to go CAT free. This will need engine remapping when fitted,

Should release a little more power & torque.

I will do a short YouTube video when I get a chance so you guys can have a listen.


Look awesome! I think I am sold!


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post #6 of 39 (permalink) Old 04-06-2018, 04:16 PM
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It looks a little unfinished. Are you going to paint it or leave it as-is?
If I could weld like that I wouldn't cover it up with paint
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post #7 of 39 (permalink) Old 04-06-2018, 06:11 PM Thread Starter
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The pipe is made in stainless steel and the segmented section weld is how it is supposed to look. When I received the headers the whole system will Mach, so shouldn't look so odd. Although I am considering ceramic coating or even copper plate.
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post #8 of 39 (permalink) Old 04-06-2018, 08:12 PM
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If I could weld like that I wouldn't cover it up with paint
pretty much. i couldn't come close to that in my dreams LOL. definitely a different look ; have to see the whole thing when finished.
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post #9 of 39 (permalink) Old 04-07-2018, 05:07 AM
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The pipe is made in stainless steel and the segmented section weld is how it is supposed to look. When I received the headers the whole system will Mach, so shouldn't look so odd. Although I am considering ceramic coating or even copper plate.


Mike, before I make an order, can I check its easy to fix? It looks pretty simple ... I am not very mechanical. If you take the CAT out is it then not road legal? And where do you get the headers from? Cheers


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post #10 of 39 (permalink) Old 04-07-2018, 09:46 AM
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Mike, before I make an order, can I check its easy to fix? It looks pretty simple ... I am not very mechanical. If you take the CAT out is it then not road legal? And where do you get the headers from? Cheers


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In almost every country if you remove the muffler/catalytic converter it will not pass emissions or sound level inspections. Some aftermarket mufflers will still provide some level of sound level control with a baffle that might be able to be removed. But if you do take out the stock muffler/pipes I would keep them around in case you need to replace them to pass an inspection.

As far as muffler/pipe installation in most cases it's relatively simple and only requires 3-5 tools, most of which are very common.
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