Mahle Rings Case Formerly IH 291 CID 4.8L C291 IH 6 Cyl Gas Eng 3.750in Bore Sleeve Assy Ring Set PartNumber : mhlS40923 Description : Mahle Rings Case Formerly IH 291 CID 4.8L C291 IH 6 Cyl Gas Eng 3.750in Bore Sleeve Assy Ring Set Engine Components::Sleeves