The Remflex 6013 is a 100% graphite exhaust gasket built to seal the exhaust ports on the Mopar inline-6 5.9L Cummins 24-valve and hold up under extreme heat. The soft graphite construction crushes to conform to the sealing surfaces, fills minor imperfections, and rebounds as the joint heats and cools, so it keeps a tight seal without repeated re-torquing.
- Material: 100% graphite
- Heat resistant up to 3,000 degrees F
- Built-in 50% crush fills gaps and surface imperfections up to 1/16 inch
- Rebounds against the sealing surfaces, so it never needs re-torquing
- Fits: Mopar inline-6 5.9L Cummins 24-valve
- Part number: 6013
FAQ
What does the 6013 gasket fit?
The 6013 fits Mopar inline-6 5.9L Cummins 24-valve. Confirm your exhaust port shape and bolt pattern before ordering.
Does the 6013 need to be re-torqued?
No. The graphite rebounds against the sealing surfaces as the joint heats and cools, so it holds its seal and does not require re-tightening.
Will it seal a warped or pitted surface?
Yes. The built-in 50% crush lets it fill gaps and surface imperfections up to 1/16 inch.
How much heat can the 6013 handle?
It is rated for continuous exhaust heat up to 3,000 degrees F.

