Just wondering why no one ever uses the P600b and always goes to the P1SC of D1SC. I know it needs a return line for oil, but is that the only reason. Inquiring minds want to know.

 

I have one on my car (p600b) and it worked fine untill I built my new engine. Now It won't make enough air so I am buying a D1. I would say If you are keeping your motor stock or mildly worked you would be ok other than that don't bother.

 

the oil line turns me off, always did. thats why if i get a supercharger it will be an ati self contained P1 or D1