Dilbeck
01-16-2008, 01:46 PM
Checking to see if anybody has the same os37 with the quiet century muffler running on a Hawk pro, The stock muffler was easy 1 turn out on high speed and factory on the low needle. This muffler i love but seem to be adjusting it from 1-1/4 to 1-1/2 to 2 turns out on high speed needle based on how cold it is out, Anyone with the same setup?