to my wife: exhaust = better mileage, turbo upgrade is low cost & adds value, etc. ... But I can relate to neighbor issues. I've had 5 bicycles stolen in 17 years here. Now, I own used bikes, scratch up new parts before installation, never wash it, so I have a mechanically great bike that looks like an old beater. Maybe I can keep this one a while. ... I hope you have a car alarm with a remote by your bed.