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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1991 GMC R3500 Base.
Dorman
$6.55
Standard Motor Products
$3.74
Walker Exhaust
$12.94
Standard Motor Products
$121.45
Standard Motor Products
$10.15
Dorman
$8.92
Kooks Headers
$85.62
AP Exhaust
$2.21
Walker Products
$23.95
Walker Exhaust
$8.76
Four Seasons
$40.41
DEI
$34.69
Standard Motor Products
$38.60
Eastern Catalytic
$317.12
Standard Motor Products
$163.29
Delphi
$17.66
Four Seasons
$43.72
Kooks Headers
$104.90
Walker Exhaust
$195.83
Dorman
$5.53
This page groups parts listed for the 1991 GMC R3500 Base. 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 exhaust systems parts for the 1991 GMC R3500 Base. 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 Kooks Headers, Standard Motor Products, Walker Exhaust, Dorman, and Four Seasons, 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.
