% Of Difference Guesstimation - Road Glide Forums
Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 5 (permalink) Old 02-20-2019, 07:39 AM Thread Starter
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% Of Difference Guesstimation

So I've been pondering new exhaust.

I like the FM Jackpot High Roller slip ons and now am trying to justify the Jackpot header vs decatting my stock headers. Does anyone have a reasonably accurate guess as to what the % difference there would be in performance each way? Of course factoring in an air cleaner as well.

So just to be sure I'm clear, not a difference from stock all together, just the difference between the head pipes.

Thanks in advance,
Wade

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post #2 of 5 (permalink) Old 02-20-2019, 08:56 AM
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In a basically stock bike probably nothing you're gonna feel. Even on charts I've seen very little if any..BUT if you're going to build that motor then there may be some to gain
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post #3 of 5 (permalink) Old 02-20-2019, 09:31 AM
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I'm not so sure you would even be able to tell the difference, especially on a butt dyno. Just my $.02.

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post #4 of 5 (permalink) Old 02-20-2019, 09:34 AM
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only thing that concerns me about de-catting the header pipe is that the flat earthers return to power and start regulating motorcycle exhausts.

have pondered the upgrade myself, and if/when i upgrade i would get a replacement header.

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post #5 of 5 (permalink) Old 02-20-2019, 10:02 AM Thread Starter
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Thanks y'all, I'm not going to build the motor, maybe cams and push rods is all, looks like a catectomy is in my future.

Wade
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