Nice to see this thread getting a top-up Chris... 

so your exhaust is 2 3/4" Genie is that right? Can I ask why you went for that size 2 3/4" ? we were told 2 1/2"
I am really getting confused.![]()
If you are referring to your HDJ80, they sing along nicely with a 3" system and a good dump pipe.
A good exhaust is more than just about the pipe.
Chas, add an intercooler, manual boost adjuster and a tune and that engine will really sing along![]()
Yes it's the HDJ80, already got an intercooler, 3" exhaust but no 3" dump pipe yet, it's something I've not got round to yet. I'm not really wanting more speed, she's an old girl and I wouldn't want to do her any damage but better economy would be nice.