They're not easy, but they're not difficult. You just have to be patient, because it takes a long time. They sound good, I just wired it into my rear door speakers, so they're not super loud. I would need to invest in another amp for that. the most difficult part is getting the right size wood/plastic for the speakers to mount onto.
well, the chrome was a plastic insert that was held in by screws, so i took out all the inserts and painted them. it's holding up fine, and was really easy, so i guess it would work on your friend's wheels.
It sounds good. I didn't like the sound of the headers at first. It reminded me of the sound of a diesel volkswagon car. But I really like it now with the exhaust.
The Weapon-R S-pipe should be here in about a week, and i'm hoping that should make it sound even better. I ordered it all at the same time, but they sent me the S-pipe that went with their header and not with the stock header, so it wouldn't fit.
I don't, the roads aren't very flat here, so I'll probably keep it stock height.