M8 exhaust....exhausted - Road Glide Forums
Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 19 (permalink) Old 06-26-2019, 01:15 AM Thread Starter
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M8 exhaust....exhausted

hello everyone. Opinions on removing the cat or buying a header. Either better or the same.
thank you
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post #2 of 19 (permalink) Old 06-26-2019, 08:13 AM
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I purchased a header with the cat removed on the auction site. That way I have my old header with the cat if I ever needed it. The price was very reasonable in my opinion and I am happy with the results. I also keep my warranty, my State does not have emissions inspections.

2020 FLTRXS, Vivid Black, KW Slicer Front Fender, Sundowner Seat/Modified by Mean City Cycle for trips, Mustang Wide Tripper Solo Seat
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post #3 of 19 (permalink) Old 06-26-2019, 08:52 AM
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The CAT in the M8 is so very minimally invasive and the #s that tuners are getting with them IN does not really warrant a removal in my opinion - This CAT was designed to make the EPA Happy and really.......is not bad at all - But, your bike, your $$....... and just my .02

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post #4 of 19 (permalink) Old 06-26-2019, 09:40 AM
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I agree with Eddie, unless you do a lot of 2-up riding. The location of the CAT in the head pipe of the M8 is torture for your passenger if you live in a warm climate already. That was the first thing my wife noticed when we went from the 2015 to the 2018. We took one weekend trip and she told me that was the first thing that needed to change.
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post #5 of 19 (permalink) Old 06-26-2019, 10:07 AM
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Quote:
Originally Posted by SteadyEddie View Post
The CAT in the M8 is so very minimally invasive and the #s that tuners are getting with them IN does not really warrant a removal in my opinion - This CAT was designed to make the EPA Happy and really.......is not bad at all - But, your bike, your $$....... and just my .02
I agree with your statement, but removing it does help with the heat. Living in Florida, it does make a difference, to me anyway.

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post #6 of 19 (permalink) Old 06-26-2019, 10:46 AM
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Originally Posted by FLTRXS18 View Post
I agree with your statement, but removing it does help with the heat. Living in Florida, it does make a difference, to me anyway.
If two up, yes....Solo, me personally here in Chicago Muggy Summers......never bothers me

Again, just my opinion - If two up, yes, your passenger will be happy - If chasing MAX Performance out of your engine then by all means, yes......for everyday riding with most being solo......don't see it as an issue

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post #7 of 19 (permalink) Old 06-26-2019, 10:50 AM
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I asked my wife about the heat thing. She said it wasn't any worse then the last bike, which was a 103 Street Glide with V&H Power Duals on it. To me it doesn't seem much different either. I do have a CoolFlow fan on the bike, but it's only running at low speeds and stopped.

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post #8 of 19 (permalink) Old 06-26-2019, 11:02 AM
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Originally Posted by craigffb View Post
I asked my wife about the heat thing. She said it wasn't any worse then the last bike, which was a 103 Street Glide with V&H Power Duals on it. To me it doesn't seem much different either. I do have a CoolFlow fan on the bike, but it's only running at low speeds and stopped.
I was thinking of decatting after warranty for heat reasons. Does the CoolFlow make much of a difference and worth the price?
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post #9 of 19 (permalink) Old 06-26-2019, 11:05 AM
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Originally Posted by 18 Wicked Special View Post
I was thinking of decatting after warranty for heat reasons. Does the CoolFlow make much of difference and worth the price?
Honestly I really don't know. I got it off a clearance table and put it on the bike like a week after I got it. Like I said in the pervious post I can really tell much difference from my last bike and it had an aftermarket header. My Road Glide still has the OE exhaust.

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post #10 of 19 (permalink) Old 06-26-2019, 11:17 AM
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Originally Posted by craigffb View Post
Honestly I really don't know. I got it off a clearance table and put it on the bike like a week after I got it. Like I said in the pervious post I can really tell much difference from my last bike and it had an aftermarket header. My Road Glide still has the OE exhaust.
It must then, that was one thing both my fiance and I noticed, heat from the right side. Never noticed it on prior bikes('93 FLHS, '03 FXDWG). Only changed out the mufflers to S&S grand nationals on the '18 FLTRXS. Going to add the SE tuner and V&H naked intake first, then consider the CoolFlow
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