Want to mitigate your risk from a hydro-locked motor if an injector cup nipple o-ring goes bad?  Install this kit with its perimeter shelf installed on the injector cups to get you there!

This Master Kit includes everything you need to rebuild your high pressure oil rails. 

1) F60L-8NIPPLE    Includes 8 Injector Cup Nipples 
2) 8 Heavy Duty Viton Blend Injector Cup Seals
3) F60L-BALLSKT   Installation/removal tool - 1/2" drive Nipple Cup Impact Socket

The Final Step in Leak-proofing Your 6.0L Diesel Engine!!
      If You're Going to Install Head Gaskets and ARP Studs, You Might As Well Leak-proof Your Oil Rails Too!
      After 2 Years of Research & Development HHC started to offer The First & Only Leak-proof Nipple Cup/Ball Tube Design! Their Patent Pending Design is Made of Hardened Tool Steel & Features a Deflection Groove to Make Sure a Leak At The Nipple Cup Seal Will NOT Follow the Body of the Nipple Cup To Your Top Injector Seal and Cause a No Start. Don't Get Stranded Re-Using Your OEM Nipple Cups or Some Cheap Aftermarket Nipple Cups!
The shape and size of every single part of our nipple cups has been designed and tested to ensure the best possible seal in either a brand new high pressure oil rail or an old worn out rail. Even in the worst conditions, HHC nipple cups out-perform the competition and the original OEM design. Other aftermarket options are not only made of soft steel, which will wear out quickly, but they are also smaller than the OEM cups. In an older oil rail, a smaller nipple cup will not seal as well and you will end up with leaks sooner than later.