1) Install time: bout an hour3.0 said:
2) Overall gains: 7-10 whp for a Short Ram, a little more for a CAI
3) Negative effects: poorer mileage because you'll be on the gas all the time to hear it!
4) Cleaning: follow directions. I think every 15k it needs to be cleaned.
5) Maintenance: see #4
v6accord.com is supposed to be back up sometime tomorrow (fingers are crossed), so you're more than welcomed to check over there if you want.