This listing is for a set of six (6) Sealed Power Hypereutectic Piston & matching Hastings or Mahle Cast Rings. +.040 or 3.915" over bore size. Sealed Power hypereutectic, coated skirt pistons and a cast steel ring set compatible replacements for 1996-2006 Jeep models with the 4.0L 6-cylinder engine. HEAD TYPE: Recessed head .116" deep RING LANDS: 1.50mm-1.50mm-4.00mm COMP. DISTANCE: 1.592" PIN DIAMETER: .931"