MAPerformance Rear Main Seal Housing



One of the most common issues we have seen when it comes to the 4 Cylinder Ecoboost engine has been the leaking rear main seal. Stock and modified motors seem to all fall to the same fate of a warped or worn seal. We have replaced the flimsy stamped factory piece that has a non-replaceable hard seal, with a 6061 Aluminum seal housing, and replaceable seal. Not only will this prevent the oil leaks, but it also offers the ability to service it with replaceable parts, and stiffens the rear of the block.

Please Note: This will not work with Competition Clutch dual clutch kits.



  • Stiffer Billet Rear Housing that will resist warping
  • Replaceable Seal


  • Easy to install
  • Wider seal contact area
  • Stiffens the rear of the block

Additional information

Weight 15 oz
Dimensions 14 × 12 × 3 in


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