Got to change o2 bungs for installation of AutoTune. Any considerations for concern as far as correct placement. V&H Dresser Duals. Hate to screw em up. Anyone have 09 duals for trade? Thanks ahead for any information.

 

They need to be up close to the exhaust ports at a 90 degree angle.

 

Plus...they are 18mm (as compared to the 12mm stockers), so a larger bung, up next to the exhaust port, is mandated.

If you have a muff shop do the install, you might want to take a few pics with you cause the depth and angle is important. You certainly don't want to run into any install issues when you get back home.

Maybe a consideration would be to purchase a new header with the appropriate bungs already installed and just sell your current model.