Do 07 & 08 flow more??

[Cutty]

With the increase in motor size, 88" to 96" are the HD dresser passing more gas?? I heard an 08 Street Glide with stock muffs, very impressive sound. (This post is about the MUFFLERS making more sound). My friend heard an Ultra Classic 09 and said he thought the Street Glide 08 was louder. That being said the U.C. exhaust is routed differently, probably same muffs.

Edited October 11, 2008 by Cutty
Post was for muffler flow and sound.

[GeorgeS]

Look up the Diameter of the Intake Manifolds, Usually stated in MM.

 

Increasing the size of Exhaust pipes is common proceedure to increase performance of Harleys. And Muffler capacity.

 

My brother in law, who builds engines, and rides Harleys recently told me that most Harley's can benifit from a larger, more free flowing exhaust system. Header diameter, and Muffler size.

 

But I'm not an expert on harleys.

[CrazyHorse]

Yes they seem louder then with the EVO motor. More aggressiveness to them.