Melling 10551ST Features:

Melling high performance oil pumps provide dependable performance every time in every application under the toughest RPM conditions. The Melling high performance cast iron oil pump series features a doweled housing and cover, extended drive and idler shafts for additional support at increased RPM’s, a screw in relief spring plug, CNC machined cover and housing that is manganese phosphate coated, standard volume and high volume patented billet Shark Tooth gears, and a chrome moly drive shaft with steel guide. Includes lower pressure spring and self locking socket head bolts with wrench for use with bolt on screen pumps. Every Melling high performance oil pump is individually tested for pressure and flow under actual engine operating conditions. Melling high performance Shark Tooth oil pumps are recommended for all applications where a high performance oil pump is needed.

• High volume performance upgrade for M155HV.
• 25% increase in volume over standard oil pump.
• Housing and cover are CNC machined and phosphate coated.
• Includes installed +10 psi higher pressure relief spring and optional -10 psi relief spring.
• Includes 12550 chrome moly intermediate shaft with steel guides.
• Billet steel "Shark Tooth" helical gears.
• Uses 3/4" diameter press in screen.
• Additional Cover Shaft Support: No
• Additional Volume Over Stock Percentage: 0.25
• Adjustable Bypass Pressure: No
• 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: Crankshaft
• Gasket Or Seal Included: No
• Gear Material: Billet Steel
• Gear Type: Shark Tooth Helical Gear
• Gears Included: Yes
• Governor Spinner Included: No
• Grade Type: Performance
• Guide Included: Yes
• Hardware Included: No
• Height: 4.75 in.
• Housing Finish: Phosphate Coating
• Housing Material: Cast Iron
• Inlet Size (in): 0.75
• Intermediate Shaft Included: Yes
• Manufactured For: GM SBC
• Manufactured Pressure: (Green) 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: (Yellow) 58 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: M155HV
• Washers Included: No
• Width: 3.23 in.