I have been reading a lot of posts lately and i was wondering what exactly does a port job entail? What kind of difference does it make? Are there different levels of porting, if so, what difference do they make? What kind of power gains can be had with a port job? Thanks in advance for your patience.

 

http://www.mazdatrix.com/engsptb.htm

 

Also head over to nopistons.com They have a huge section on porting......just search Judge Ito....