Thanks for the fast reply. I have the SE stage 4 kit installed. It comes with the SE tuner. Its suppose to be all "blueprinted" for maximum performance. Who really knows, I'll probably need more parts, Thats the Harley way , LOL. I actually didn't even pick the bike up yet but everything was just completed a week ago. I'm in Cleveland for two weeks and I went to a few dealers today to pass the time and I got to thinking about this issue.
If anyone else knows about this feel free to chime in also.
Originally Posted by skruzluce
i gotta bet you're getting plenty of air as is really and will just be adding more with the heavy breather. So i guess what i'm saying is a shortage won't be an issue and rarely is on an H-D (especially lately as they come out of the factory running near 17 on the air/fuel (13~14 being ideal) i'd probably rather it be only 50mm to choke it down some and cool er off. I assume you have an efi tuner of some sorts that will also need re-tuned to the added air-flow. My opinion only, and hope it helps some