Ecotec Timing Chain Upper Guide Bolt

This aftermarket piece replaces the plagued stepped shoulder bolt that has a high tendency of breaking in the Ecotec 2.0, 2.2, 2.4 liter GM engine. It is far superior in every way and will not require you to replace the head that can be damaged when the factory bolt breaks. An absolute must have for every GM Ecotec 4 cylinder engine.