Alot of questions but not alot of buyers; answers to the most common are below
Cams are ground using a master cam, a master cam is like a mold or a die or a guide what ever you want to call it, hks tomeii camtech crow cams all use the same master cam for this profile, one of them or an independant cam grinder designed the cam and sold a copy of the master cam to the others
Performance doesnt soley rely on turbos or cams etc it works as a complete motor to work as a solid unit to gain the most power and life out of all parts
Power range is estimated at 3000-8500+ (depending on supporting modificiations) power rev range will change with adjustable cam gears
I bought these for $750 never used, decided I wanted something a little bigger
As the cams will alter the air fuel ratio yes you will need to remap your computer
For a bit extra I can supply valve springs
Flywheel has never been used, weighs 5.5kg, never been fitted to a car usually sell for $430ish
No stupid low ball offers, im already loosing money on these