I'm putting a turbo kit on my 94 Del sol,
i'm change my throttle body, sparkplugs, Intake Manifold, Pistons. Do i need to change anything else?

 

why do you need to change your intake manifold?
you dont NEED to change any of this stuff, its just a good idea.
www.d-series.org is your friend

 

My car has 170k miles on it, someone told me to be safe to replace those parts with performace parts. Is there anything i need to do to my car?

 

yes you need to do allot more reading before you do anything to your car.

 

before you change any of that u stated..make sure u have the few things that usually dont come in a kit...

injectors...fuel pump...ecu/something to tune it on..arp headstuds are a good idea..

 

What i would do is replace headgasket, timing belt, and install ARP head studs. How much boost do you plan on running? What turbo? How is it being tuned? More info is needed...

 

my friend is running a stock d16 on 20lbs of boost on crome going on 1 year now. shizzz crazzzy. dont listen to people that tell you you need sleeves and other crazy big money stuff. slap a turbo kit on and tune it. woooot. dont worry about the miles on it. do regular maintanance and youl be fine

 

wrong forum buddy.

EDIT:
OH. its an 09 with 2 posts. PLEASE read forum rules and guidelines before posting