This kit is compatible with these Northern part numbers: 239310, 239208, 239297, 239298, 239097, 239099, 239158, 238780, 239312, 239024, 239208, 239327, 239337, 1720006, 1720166, 1720178, 1720204, 1720001, 1720005, 1720128, HCL11700, HCL11464, HLX11800, CT13120, CTX13125, CTX13145, CT13130, CTL4606, CTL4544, CTL4584, CTL4553, HCL10883, HCL10880, HCL10882

• Replacement bolt kit for populat Peterbilt and Kenworth bolt-together radiators
• These kits would be used when an installer is replacing a top or bottom tank or when a radiator is being re-cored