Complete set of (15) valve cover torque limiter sleeves plus Grade 8 hardened, black flange bolts for 4.0L engines used in the following: 1997-2006 Wrangler TJ LJ, 1996-2001 Cherokee XJ, 1996-2004 Grand Cherokee ZJ WJ. These torque limiters replace Mopar 53020598AB which is no longer in production. They are used on all 4.0L's 1996 and after that use grommets on the valve cover bolts. They prevent the grommets from being crushed and are absolutely necessary. These are better quality than OEM and far better quality than the 3D printed replacements that are out there. They are machined from 6061 Aluminum, anodized black and they are MADE IN THE USA. Sold by a small business in the US and we actually use these parts ourselves.