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Old Oct 24, 2020 | 11:39 AM
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Default Thunder Header
Who's running thunder headers and what kind of fuel mileage are you getting? (what carb too)

Just curious...
 
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Old Oct 24, 2020 | 02:12 PM
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What makes you think an exhaust is going to screw with your mileage?
 
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Old Oct 24, 2020 | 04:21 PM
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I am. No idea on my fuel mileage as it is a motorcycle and I don't care. If I had to guess maybe 35 on my v111 and 40 on my Twincam Dyna. Both with built motors
 
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Old Oct 24, 2020 | 04:23 PM
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FWIW, I had thunderheaders on my bike running a Wood CV40 and was getting in the low-mid 40's. Swapped them to Supertrapps and Hp stayed the same and dropped the Tq a few points to be quieter. Mileage did seem to go up a little to hig 40's - low 50's mostly on backroads.
 
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Old Oct 25, 2020 | 10:30 AM
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Thanks guys,

I do like the way they sound and would love to have one cut open to see exactly how the baffle is made. But for the money of even a beat up used one, that ain't happening...
 
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Old Oct 26, 2020 | 09:31 PM
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I'm also thinking about a thunderheader for my evo heritage, because I can't give a decent set of performance slip on mufflers to fit.... Don't know if I can justify the cost though.
 
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Old Oct 27, 2020 | 05:59 PM
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I just got a Thunderheader on my 1991 FXR. Well worth the cash. Sounds way better than previous exhaust and seems to perform better as well. I got the bracket from Ramjet Racing as well.
 
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Old Oct 27, 2020 | 06:07 PM
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Originally Posted by Rupert
I just got a Thunderheader on my 1991 FXR. Well worth the cash. Sounds way better than previous exhaust and seems to perform better as well. I got the bracket from Ramjet Racing as well.
Not many, except Custom Made, will outperform a Thunderheader..
I would like to see a picture of the "new" rear mounting system, as that was a bad design early on for the FXR
 
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Old Oct 27, 2020 | 06:18 PM
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Originally Posted by Racepres
Not many, except Custom Made, will outperform a Thunderheader..
I would like to see a picture of the "new" rear mounting system, as that was a bad design early on for the FXR
Not cheap but I like the peace of mind knowing that it isn’t gonna snap


 
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Old Oct 27, 2020 | 06:21 PM
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Looks Nice... But I wanted to see more Where it Mounts.. Too many mounted to the frame Failures to Suit me.. Starting with my 1982!!!
 
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