Upgrade to Long Tube headers on your 2020-21 Chevy Silverado or GMC Sierra HD with this system from Stainless Works. Unleash that 6.6L motor with 2" primaries that flow into a 3" collector with an integrated merge spike. This system comes with high flow cats and a Y-pipe for a simple bolt-on install.

This Part Fits:

Year	Make	Model	Submodel
2020-2022	Chevrolet	Silverado 2500 HD	Custom
2020-2022	Chevrolet	Silverado 2500 HD	High Country
2020-2022	Chevrolet	Silverado 2500 HD	LT
2020-2022	Chevrolet	Silverado 2500 HD	LTZ
2020-2022	Chevrolet	Silverado 2500 HD	WT
2020-2022	Chevrolet	Silverado 3500 HD	High Country
2020-2022	Chevrolet	Silverado 3500 HD	LT
2020-2022	Chevrolet	Silverado 3500 HD	LTZ
2020-2022	Chevrolet	Silverado 3500 HD	WT
2020-2022	GMC	Sierra 2500 HD	AT4
2020-2021	GMC	Sierra 2500 HD	Base
2020-2022	GMC	Sierra 2500 HD	Denali
2022	GMC	Sierra 2500 HD	Pro
2020-2022	GMC	Sierra 2500 HD	SLE
2020-2022	GMC	Sierra 2500 HD	SLT
2020-2022	GMC	Sierra 3500 HD	AT4
2020-2021	GMC	Sierra 3500 HD	Base
2020-2022	GMC	Sierra 3500 HD	Denali
2022	GMC	Sierra 3500 HD	Pro
2020-2022	GMC	Sierra 3500 HD	SLE
2020-2022	GMC	Sierra 3500 HD	SLT