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5th June 2019
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XL FORUM TEAM MEMBER
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Join Date: Feb 2017
Posts: 354 Sportster/Buell Model: xlh Sportster/Buell Year: 2003
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hey ditch remember to post some pics when you get a chance
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5th June 2019
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XL FORUM TEAM MEMBER
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Join Date: Jan 2009
Location: In a swamp/Michigan
Posts: 13,990 Sportster/Buell Model: XL1460C Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL1200R Sportster/Buell Year #2: 2006 Other Motorcycle Model: XL1200R Other Motorcycle Year: 2004
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That is correct on the caps and disc’s
__________________
I.B.A.#26543, Growing old-Mandatory/ Growing up-optional. Men do not quit playing because they get old, they get old because they stop playing! 
The XL Forum Sportsterpedia:
http://sportsterpedia.com/doku.php/start
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6th June 2019
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XL FORUM LIFE MEMBER
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Join Date: Nov 2004
Location: Long Island, NY
Posts: 4,816 Sportster/Buell Model: XL1250c Sportster/Buell Year: 2002
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Quote:
Originally Posted by robbie202
@mike you are running open end cap and 20 disks.
the video on the supertrapp website says for the 4 inch "open end cap flows for about 10-12 discs"
does that mean that if you were running say 20 discs with the closed cap that you could use the open cap instead and run 8-10? am i understanding this correctly?
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Yup. Like paul said above you are correct on that. 1 open ended end cap is equivalent to 8-10 disks so according to Supertrapp my pipe should perform the same way as it does now with 20 disks and the open end cap as it would with 28-30 discs and a closed end cap.
There is even an adjustable end cap that you can open and close to make more adjustments with.
https://catalog.zodiac.nl/en/catalog...rapp-mufflers/
https://shop.thunderbike.de/en/Thund...ff-Or-Not.html
https://www.baronscustom.com/catalog...682/index.html
__________________
2002 XL1200C (originally)
Hammer 1250 kit W/ 30° reverse dome pistons, billet 2.25" crush forward offset open air cleaner, billet intake manifold, Impact 560's, Sledge Hammer pushrods, Buell XB heads with crush level head porting, Mikuni HSR 45, 177.5 main, 25 slow, Clip 4th slot from top, Jim's powerglide II lifters,
Supertrapp supermeg exhaust 20 disks and open end cap, S&S roller rockers, Alto Carbonite clutch, Energy One 15% heavier spring, Daytona twin tech single fire ignition 1005s
Ricor intimnators, 13" Ricor IAS shocks, Brembo dual disk setup from 2012 street glide w/ matching brembo street glide master cylinder,
Koso T&T multi function speedo/tach
Dyno Sheet
96.21 HP/88.70 TQ
States I Have rode through
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3 Weeks Ago
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Biker
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Join Date: May 2019
Posts: 19 Sportster/Buell Model: XL Sportster/Buell Year: 2003
Reputation: 10
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i went with the $100 Super Trapp. Had to grind down my brake pedal, and the front foot pegs don't work with it. I will report once break in is complete.
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3 Weeks Ago
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XL FORUM TEAM MEMBER
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Join Date: Feb 2017
Posts: 354 Sportster/Buell Model: xlh Sportster/Buell Year: 2003
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I cut my brake too.
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