Melling 10990 Features:

Melling high performance oil pumps provide dependable performance every time in every application under the toughest RPM conditions. High volume performance upgrade for the M-99HV-S. The 10990 is a big block style oil pump made to fit the small block applications. The drive and idler shafts have been extended to allow for additional support in the cover. Additional support eliminates dynamic shaft deflection at increased RPM levels. The cover is doweled to the pump housing to assure alignment of the shaft bores. The relief valve has a screw-in plug instead of a pin. The housing and cover are CNC machined and phosphate coated. An additional spring, the original stock replacement is supplied which will reduce bypass pressure if needed. Includes 12550 chrome moly intermediate shaft with steel guide. Built with billet steel gears. Every Melling high performance oil pump is individually tested for pressure and flow under actual engine operating conditions.

• Additional Cover Shaft Support: Yes
• Additional Volume Over Stock Percentage: 0.25
• Adjustable Bypass Pressure: Yes
• Alternate Pressure Springs Included: Yes
• Anti-Cavitation: No
• Bolts Included: No
• Bushing Included: No
• Cotter Pin Included: No
• Cover Material: Cast Iron
• Drive Shaft Included: Yes
• Drive Type: Drive Shaft
• Gasket Or Seal Included: No
• Gear Material: Billet Steel
• Gear Type: Spur Gear
• Gears Included: Yes
• Governor Spinner Included: No
• Grade Type: Performance
• Guide Included: Yes
• Hardware Included: No
• Height: 5.25 in.
• Housing Finish: Phosphate Coating
• Housing Material: Cast Iron
• Inlet Size (in): 0.75
• Intermediate Shaft Included: Yes
• Manufactured For: GM SBC
• Manufactured Pressure: (Pink) 70 PSI
• Mounting Hole Diameter: 0.24 in.
• Mounting Hole Quantity: 2
• Nylon Bushing Included: No
• Oil Pump Pressure Type: High Pressure
• Oil Pump Type: Gear
• Oil Pump Volume Type: High Volume
• Optional Spring Pressure 1: (Plain) 52 PSI
• Optional Spring Pressure 2: N/A
• O-Ring Included: No
• Pickup Screen Included: No
• Pickup Tube Diameter: 0.75 in.
• Pump Cover Included: Yes
• Screen Information: 3/4" Press In
• Shaft Material: Chromoly Steel
• Spacer Included: No
• Timing Cover Included: No
• Upgrade for Pump Number: M-99HVS
• Washers Included: No
• Width: 3.76 in.