COMETIC MLX (Multi-Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re-torque required.

This Part Fits:

Year	Make	Model	Submodel
2017-2020	Chevrolet	Silverado 2500 HD	High Country
2017-2020	Chevrolet	Silverado 2500 HD	LT
2017-2020	Chevrolet	Silverado 2500 HD	LTZ
2017-2020	Chevrolet	Silverado 2500 HD	WT
2017-2020	Chevrolet	Silverado 3500 HD	High Country
2017-2020	Chevrolet	Silverado 3500 HD	LT
2017-2020	Chevrolet	Silverado 3500 HD	LTZ
2017-2020	Chevrolet	Silverado 3500 HD	WT
2020	GMC	Sierra 2500 HD	AT4
2017-2020	GMC	Sierra 2500 HD	Base
2017-2020	GMC	Sierra 2500 HD	Denali
2017-2020	GMC	Sierra 2500 HD	SLE
2017-2020	GMC	Sierra 2500 HD	SLT
2020	GMC	Sierra 3500 HD	AT4
2017-2020	GMC	Sierra 3500 HD	Base
2017-2020	GMC	Sierra 3500 HD	Denali
2017-2020	GMC	Sierra 3500 HD	SLE
2017-2020	GMC	Sierra 3500 HD	SLT