butt dyno? maybe....but i'm sure gunky plugs decrease performance (although, i never saw what condition they were in).

The itemized break down went like this...using rounding....

Oil $70
Filter $20
Plugs $145
VC Gaskets (2) $180
O Rings (3) $20
Spark Plug Boot (8) $250
Seal $10
Guide Tube $30
Labor $500

I would have liked to have do it all myself.....I love to turn wrenches, but I have no time...and would have needed to buy a torque wrench (which isn't a bad thing and I'll probably buy one anyway at some point)

__________________
2005 x5 4.4i sport