Core based oil pans are based off the same oil pan that came from the factory & are made of a drawn steel stamping. Moroso has taken the time & engineering to produce the best cores to fit the most applications available. In many cases, OEM cores that came in many cars & trucks are often a “typical” core that fit a variety of vehicle & engine combinations. But some manufactures had “special” core combinations that are rare and have certain irregularities that are not common. It is the responsibility of the end user to be aware of these applications & understand that all aspects of the oil pan may not be OEM compatible on the engine or in the vehicle. Moroso Performance core based oil pans are designed for both OEM & aftermarket blocks & engine combinations. This fact makes the addition of stroker notches, larger sumps, & power kick-outs a necessary design aspect. Certain oil pans will have OEM located bolt holes omitted to accommodate stroker notches. This has been intentionally designed this way, & with proper attention to sealing the area, will work in any application. These features will make the assembly of the oil pan more complex than OEM replacements. Core based oil pans are also subject to a certain amount of warping from the welding of fabricated components to a steel core. Core based pans often have tighter clearances to splayed main caps, rotating assemblies, & billet aluminum wet sump oil pumps. Mock-up fitments are more critical in these situations. Once a core based oil pan is fastened to the engine in its final assembly, knowing the oil pump clearance, & rotating assembly clearance will ensure ideal performance & longevity for your Moroso Oil Pan. Road race baffling is designed in consideration of lateral forces as well (for left & right turns). The Diamond baffle is a trap-door system that has a square arrangment of trap door baffles, rotated 45-degrees. Each side has its own door that opens inward (towards the pickup) so the pickup is always fed.
  • Wet Sump
  • Clears 4.25/4.090 stroke (steel/alum rods)
  • Steel
  • Baffle
  • Core Based
  • 7qt
  • 8 Deep
  • Mark IV (NOT Gen V/VI)
  • '62-67 Chevy II (No power steering)/'55-57 Chevys (trans in stock position)
  • Notched rear sump clears steering linkage

Additional Information:

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We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

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*Available on select products.