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Shovelhead performance

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Old Jan 17, 2008 | 12:23 AM
  #1  
78HARLEY's Avatar
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Default Shovelhead performance

I am looking for a good sounding exhaust. I have a diesel with a 4" straight pipe exhaust so being too loud doesnt exist
 
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Old Jan 18, 2008 | 12:49 AM
  #2  
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Default RE: Shovelhead performance

Anybody????
 
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Old Jan 18, 2008 | 01:57 AM
  #3  
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Default RE: Shovelhead performance

Why not do the same with straight drag pipes? If that is too loud or you want more back pressure, Python staggered duals sound awfully good on a shovel and give good performance also. I am just not sure if Pythons are still available for a 78.
 
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Old Jan 18, 2008 | 06:49 AM
  #4  
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Default RE: Shovelhead performance

Cycle Shack makes a good system. I have some old HP tests around here that said the CS put out some pretty good numbers. The tapered duals sound pretty good. Not as loud as drags if that is the sound you want.
 
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Old Jan 18, 2008 | 06:54 PM
  #5  
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Default RE: Shovelhead performance

Yes, I forgot about Cycle Shack. They are very good performers and cannot be beat for the price. I have used them on an Evo with very good results as to performance and sound.
 
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Old Jan 18, 2008 | 07:08 PM
  #6  
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Default RE: Shovelhead performance

You might want to think about fitting Anti-Reversion cones in straight drag pipes. I'm not sure if they are available exclusively for a shovel or if the Evo's might fit. Made a world of difference in the performance and tunability on my Evo. The exhausts in my Sig photo are Kromewerks ARII's with AR cones straight through with no mufflers or baffles.
 
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Old Jan 19, 2008 | 06:38 AM
  #7  
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Default RE: Shovelhead performance

Find a 2 into1! Cycle shack still makes one, sounds great. Cant beat a 2 into 1 for performance im my mind.
 
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Old Jan 19, 2008 | 07:23 AM
  #8  
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Default RE: Shovelhead performance

Pan620- you mean like the factory stock exhaust in 1979??

[IMG]local://upfiles/49674/4DD77C0898A647D384F682B94C3B23C7.jpg[/IMG]
 
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Old Jan 19, 2008 | 11:55 PM
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Default RE: Shovelhead performance

Cycle Shack 2 into1, maybe I ought to change exhaust after 24 years.
 
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