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Choose your trim in My Garage to confirm exact fit.
Wehrli
Part # WCF100473
$32.77
Wehrli
Part # WCF100624
$721.92
Fel-Pro
Part # 61694
$11.08
Wehrli
Part # WCF100129
$353.28
aFe
Part # 49-44125-P
$533.00
aFe
Part # 49-44126-B
$808.00
Fel-Pro
Part # ES75120
$31.39
Borla
Part # 60713
$149.99
Magnaflow
Part # 17072
$1128.28
aFe
Part # 49-44125-B
$568.00
CORSA Performance
Part # 8004000
$583.68
Fel-Pro
Part # 61323
$5.84
aFe
Part # 49-44126-P
$734.00
All 13 products shown
This page groups parts listed for the 2021 GMC Sierra 3500 HD. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.
We offer a wide selection of mufflers & resonators parts for the 2021 GMC Sierra 3500 HD. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.
We carry parts from trusted brands including aFe, Fel-Pro, Wehrli, Borla, and CORSA Performance, plus many more. Filter by brand to find your preferred manufacturer.
Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.
Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.
