What do you recommend to retain & restore performance?

I'm posting this here as I'm not really asking about mods to the car, more what standard parts to repair & replace. I have a '97 V70 T5 auto which has done just shy of 140k miles, it seems to go ok but I have no history with the car and it's bound to have some wear after that time/mileage. I've started with the 'stage 0' stuff as posted here; leads, plugs, dist. cap, oil & filter, air filter, PCV parts on order, & I'll get the injectors done as per the thread in this section. As I'm new to these cars (and turbo cars in general) I wonder if there are other things that might be worth cleaning/adjusting/replacing. Things associated with the turbo for example, or sensors/senders, or whatever?? So there you have it; what do you all recommend to retain or restore T5 performance?

One thing most people overlook is cleaning the fins out on the intercooler. This can make a big difference. If the fins are blocked the air wont be cooled. As we all know cold air is heavier and denser therefore it contains more oxygen. Also the injectors as you have mentioned. It has been proved over the last few months that dirty injectors do cause misfires, apart from losing loads of power/ smoothness Jim

Whilst doing the PCV it is worth changing the vacume tree "O" ring and the dipstick tube "O" ring and... yes you guessed it the dipstick "O" ring. They are cheap and very easy to do.

the actuators can cause problems in older life you can either wind them in a bit or buy a new one from kalmar the boost pipes are also a good thing to replace best off with samco as they are stronger and won't flex with boost pressure oter than that and what has been suggested or done i can't think of much more other than an engine rebuild