I'm a new user from Finland and this is my first thread.
So i have a 2003 astra bertone turbo coupé with z20let engine
and last July i went to re-program the car and they promised me about ~240hp and 370nm of torque.
Now my astra has been in my carage since November because of our winter over here. A few months earlier i started planning upgrading a few parts in my car so i bought firstly a vxr turbo(z20leh) from ebay. So now i need a better
intercooler and a pipe for the pre-cat. Which size should the pipe be? 60 or 70mm? I'm also buying a dump-valve and a this long pipe which has a connection for dump.
My goal is to achieve 280hp. Is there anything else that i need?