Precision HP Series is the latest in Forced Induction Technology by pushing boundaries of horsepower through super efficient design in turbocharger. As a result, more horsepower gains per pound of boost (psi), quicker spool up and more fun to drive.
Some of the HP series are also available in CEA Style compressor wheel where the wheel is cut from a solid form of aluminm versus the old cast version.
What this does is stronger material for durability, lighter wheel for better performance and even more efficient performance.