Do you guys get commission or something.There is a ton of people who do porting.It doesnt take rocket science,just some measurements and some know how. Not to mention I can send cylinders to any builder and I have his specs, if hes giving u your moneys worth.I stated porting in my garage a few years ago,and my buddies and I have not been beat by the big names on the 1/2 mile track. Yes alot of engines do run good but for $200-300 bucs in porting by some run just as good as others .