For me, the engine work is easily the best modification so far.

 

DK Custom 3" tank lift.

Inexpensive and easy way to alter the look of your ride. The DK site has instructions for a trial lift so you can see if you like the look before ordering.

 

Hard to pick one favorite mod...engine work makes it so much more fun to ride, bars, seat and forward controls make it more comfortable, paint makes it look bad ***.

If I had to pick one single thing visually, I'd have to say the 21" front wheel. Relatively subtle mod but I think it changes the whole look of the bike.

 

DIY air ride.

 

Now, you have a bunch of people that can't limit themselves to choosing one item they've changed from OEM, and I can certainly understand that. I mean when you change a number of them it's not like you can really choose just one.

I've changed a number of things and I couldn't say just one I couldn't live without, no doubt. Cams are the ticket, so is the front fender, couldn't live without the Bobcat, no way could I live with stock shocks, gotta have the Daymaker, wouldn't set foot out the door without the bags, wouldn't own the damn thing without PC but, but, my paint matched gas cap and fuel gauge caps are something that definitely sets me apart from the riff-raff

 

It is a forum. You are entitled to your opinion. No offence taken.
My '11 had the same taillight. I LOVE it!!!
Actually, I had planned on doing a "Ducktail" rear fender from a 2005 FXDWG. Maybe the next FXDB.

 

the motor work is what I like the most of all my modifications. I love performance in a machine. the next would be the new fairing.

 

There is a small difference in lean...I was trying to find the new lean angle for you, but haven't been able to track it down yet. It doesn't bother me that much, because I rarely drag parts. I'm more of a softail style rider, but enjoy the ability to ride a bit more aggressively on occasion. I'll keep looking for that lean angle.

 

while this may not be considered a customization, it's still my favorite part of the bike. This was my Father's Day gift from my one and only lil girl.

 

Tough to narrow it down to one specific item as they work together to get the job done. So instead I will put it in order.
1. Progressive 13" 444 shocks
2. Sundowner 2-up seat
3. Highway pegs
4. Saddlebags

Putting a couple hundred miles on in a day to get to some good twisty roads is my kinda of day.