View Full Version : supertrapp end cap

09-30-2009, 06:01 PM
i have just received a new end cap with a 1" 1/2 hole in it with new disc x 12 installing on 2004 fatboy v / twin can i open the hole out to 2" is the cap designed to change .?? cheers thanks .

10-01-2009, 07:15 AM
Anything can be modified; however the design of the open end cap had a specific flow rate in mind for Flat Track racing applications.