Envithyx - what do you think of that V&H 2 into 1 on your '09? I'm looking to put them on mine in a few weeks and was curious about the feel/sound/volume?
I like the pipe. Looks cleaner than the 2 into 2 for me personally, and supposed to be a bit more power given the 2 into 1 design.
As for volume, took a db meter to it using a c weight and measured behind the pipe at about 1 foot distance - probably not the same distance used by standard volume measurements. I registered 102 decibels at idle, and 106 decibels when I reved it in neutral up to about 2k rpms - tested the volume when that crazy law was passed by our Governor.
When on the freeway, it's not too loud. The faster you go, the quieter it seems as the wind noise picks up. Also, given the angle of the pipe, the noise is thrown down at the ground. At 80 MPH, it is just a bit louder than the monster ovals I have on my limited. However, if you hit WOT, you'll definitely hear it. If you are very careful, you can sneak into your neighborhood and not wake most of the neighbors. Although, I do know my neighboor 2 houses down who rides can hear me start it up. He couldn't hear the stock pipes on the Limited even when I rode it past his house.
As for the sound, kinda hard to describe this one. It's not as deep as the monster ovals at idle, but it still has that Harley sound. I especially like the sound it makes on decel, which is deep and throaty.
I've already have had one incident where 3 cars were flying through a blind corner at a gas station, as I was comming around the other side. The 1st car turned left to come my direction, the 2nd was going to turn right without stopping, and the 3rd was trying to get around the 2nd car as if he was in his way. As soon as I saw the 1st car, I cracked the throttle (was quicker to hit than my horn

), he about all but locked up his brakes and continued his turn at a slow pace. The 2nd car stopped in his tracks and the 3rd had no choice but to stop slightly to the right of the 2nd. So the pipes can get driver's attention. Mind you I was only going about 10 MPH so I really wasn't even worried about hitting them. I was a bit more worried about them hitting me or anyone else.
I've also had another bike (forget make, but very quiet running) follow me down Hwy 80 when I was splitting lanes. I thought he wanted to pass, so I moved over. He beckoned me to take lead again. I guess he figured I could make the cars more aware we were comming down increasing his safety.

As for feel, hard to say what I feel, the engine or the pipes. I would say there is a nice level of acoustic vibration that the pipes will send your way when your opening up the throttle. The chrome quality is very good and easy to maintain. There is one caveat I'm having with the pipe though. The heat shields tend to separate with heat expansion in the middle (between the rear shield, and the two shields that cover the headers). The separation is usually no more than 1/4 inch and as the pipe cools, it comes back together nice and tight. However, over time (500 miles or so for me) it won't mate up as nicely and I have to loosen and reposition the shields to get it back to where I want it.
Hope this information helps.
