Set of (2) crank position sensor shoulder bolts for 2.5L or 4.0L: 1987-2001 Cherokee XJ, 1991-2004 Wrangler YJ TJ, 1987-1992 Comanche MJ, 1993-1996 Grand Cherokee ZJ. These are a direct replacement for Mopar 6503520 only better. They are 10.9 Class (metric equivalent to Grade 8) hardened and yellow zinc plated. Don't buy a rusty used set when you can have brand new. NOTE: Regular bolts will not work for this purpose. These special shoulder bolts must be used to hold the sensor still. Sold by a small business in the US.