Merchant Injector Return Line Bolt

The Merchant Automotive 10491 Injector Return Line Bolt has been specially designed for your 2001-2004 GM 6.6L Duramax LB7. This is not just a replacement bolt. Merchant Automotive has redesigned this bolt head to allow nearly double the tool engagement. Proper engagement is crucial for accurate torque during reassembly, and to avoid fuel leaks. This unique head shape provides the needed strength to properly torque these bolts without stripping them, while still being able to maintain proper clearances of other engine components.