i must want to ask if im going to use this turbo in my 2nd gen 3sgte to replace my CT26, do i need to do some modification on my engine,i saw this turbo kit in 365motorsports, thanks guys
It depends on your goal.
How much boost are you planning to run?
Head gasket is always a good idea.
More air = more fuel
May be upgrade your fuel system with larger injectors (550 cc ?), FPR, pump ...
Also something to control them.