Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Purple Hornies Anybody?
View Single Post
  #2 (permalink)  
Old 07-24-2009, 09:40 PM
BOBCRMAN@aol.com's Avatar
BOBCRMAN@aol.com BOBCRMAN@aol.com is online now
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 7,964
Wiki Edits: 0

Thanks: 13
Thanked 221 Times in 210 Posts
The perforations just let the sound/pressure waves expand into the outer chamber. The tone of the muffler can be changed by the number and placement of the slots or perforations.
Reply With Quote