Below is a general manufacturer product group description. Please note the information below is not item specific. Item specifics are above in product details.

If you’re serious about building the ultimate wet sump system, Moroso Racing Oil Pumps are the only way to go! The nation’s top engine builders rely on Moroso Oil Pumps because of their superior design and ability to provide a smooth and consistent flow of oil at higher engine speeds.
You can’t beat a Moroso Oil Pump for precision! These pumps are manufactured using a proprietary casting process that offers superior durability and reliability characteristics. The pump body and cover assembly are manufactured to exact design specifications. Gear and inner rotor shaft assemblies are matched to maintain absolute minimum clearances and provide maximum volumetric efficiency. And each and every Moroso Racing Oil Pump is 100% pressure tested to stringent quality control specifications.
The Moroso Single Stage, Reverse Rotation External Pump for Honda motors features:

Same rotor and scroll (Gerotor) design as Moroso’s famous 3, 4, 4 and one- half, and 5 Stage Dry Sump Pumps
Eliminates stock oil pump failures
Includes pressure section specifically sized for Honda applications
External pressure adjustment allows a plus or minus 30 psi range from factory setting of 60 psi