My 1997 F250 HD is due for an Intercooler and I'm wondering if the volume/size of the I.C matters? I am eyeing up one from a freightliner at my shop but am wondering if I will suffer from severe turbo lag or slow throttle response? I would think that if the intercooler remains under pressure that the volume does not make a difference but if it empties out every time I get off the pedal then I will need a smaller one. It is a Garrett Air to Air IC. Also, where do I get the Y-pipe and the pipe from the turbo to the IC?