Thread: Doug Thorley Headers from 1972, NOS in Box
View Single Post
  #1  
Old 10-06-2017, 10:26 PM
Astock Astock is offline
Senior Member
  
Join Date: Oct 2002
Location: S.Calif.
Posts: 843
Thanks: 62
Thanked 211 Times in 123 Posts
Default
I feel the same. Nothing wrong with tri-y's. Not giving up but a couple hp. Pretty sure there's some advantage too, like fit.
Reply With Quote