Have you added a new fuel processor or is it oem? Is the air filter oem or K&N? I was also wondering about the placement of the holes. Is the any particular reason you choose the sides of the collector box for drilling as opposed to the bottom or the back of it?
That was the thing that really got me excited. It was nice and quiet when cruising. I also had Harleys looking around to see what I was on when they heard it if I was accellerating. It really does give a great growl. And it is sooo **** easy!!!!:wayhappy:Got the modification done, and out really changes the sound of the bike. I do get some sneezing from time to time, but only on a semi- coast downhill where my engine is just barely braking against the hill.
This will certainly hold me over until I get a new exhaust. The acceleration and deceleration growl is fantastic, but still rather sedate while at cruising speed.
10/10 would drill again.