45+ 1991 GMC R3500 Exhaust Systems Base Parts - Page 2

Base · Exhaust Systems (45 products)

Exact-fit parts for the 1991 GMC R3500 Base.

Standard Motor Products

Part # FJG102

Fits with Conditions

Throttle Body Injection Flange Gasket

$7.74

Standard Motor Products

Part # AT161

Fits with Conditions

MANIFOLD AIR TUBE

$163.03

Delphi

Part # ES10966

Fits with Conditions

Oxygen Sensor

$21.41

Kooks BB Chevy 2 3/8in BBC Flange 5in Spacing (Bank)

Kooks Headers

Part # 7042-AS

Confirmed Fit

Kooks BB Chevy 2 3/8in BBC Flange 5in Spacing (Bank)

$104.90

Standard EPA Direct Fit Catalytic Converter 3" Inlet (ID) 3" Outlet (OD)

Walker Exhaust

Part # 15693

Fits with Conditions

Standard EPA Direct Fit Catalytic Converter 3" Inlet (ID) 3" Outlet (OD)

$195.52

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

Dorman

Part # 03084

Fits with Conditions

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

$10.29

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

Dorman

Part # 03080

Fits with Conditions

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

$9.53

Standard Motor Products

Part # AT162

Fits with Conditions

MANIFOLD AIR TUBE

$61.86

Exhaust Tail Pipe 2.25" Inlet (ID) 2.25" Outlet (OD)

Walker Exhaust

Part # 45823

Fits with Conditions

Exhaust Tail Pipe 2.25" Inlet (ID) 2.25" Outlet (OD)

$31.59

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

Dorman

Part # 675-210

Fits with Conditions

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

$17.61

AP Exhaust

Part # M214

Fits with Conditions

Exhaust Clamp

$6.05

Standard Motor Products

Part # S-758

Fits with Conditions

OXYGEN SENSOR CONNECTOR

$12.97

Kooks BB Chevy 2 1/8in SS BBC Flange (Bank)

Kooks Headers

Part # 7040-S

Confirmed Fit

Kooks BB Chevy 2 1/8in SS BBC Flange (Bank)

$93.13

Premium SmartLink™ Universal Oxygen (O2) Sensors

Bosch

Part # 11027

Fits with Conditions

Premium SmartLink™ Universal Oxygen (O2) Sensors

$30.33

Walker Products

Part # 250-21001

Fits with Conditions

Walker Products 250-21001 Oxygen Sensor 1-W Direct Fit Narrow-Band

$27.83

Kooks BB Chevy 2 1/4in SS BBC Flange (Bank)

Kooks Headers

Part # 7041-S

Confirmed Fit

Kooks BB Chevy 2 1/4in SS BBC Flange (Bank)

$80.60

Standard EPA Direct Fit Catalytic Converter 3" Inlet (OD) 3" Outlet (OD)

Walker Exhaust

Part # 16346

Fits with Conditions

Standard EPA Direct Fit Catalytic Converter 3" Inlet (OD) 3" Outlet (OD)

$439.87

CalCat CARB Universal Catalytic Converter 3" Inlet (ID) 3" Outlet (ID)

Walker Exhaust

Part # 80907

Fits with Conditions

CalCat CARB Universal Catalytic Converter 3" Inlet (ID) 3" Outlet (ID)

$511.48

Reinz

Part # 71-13616-00

Fits with Conditions

Exhaust Pipe Flange Gasket

$19.33

Kooks SB Chevy 1 5/8in St. Fast Burn Chevy Flange (Bank)

Kooks Headers

Part # 7031-FB

Confirmed Fit

Kooks SB Chevy 1 5/8in St. Fast Burn Chevy Flange (Bank)

$38.82

Frequently Asked Questions

Do these parts fit my 1991 GMC R3500 Base?

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.

What exhaust systems options are available for my 1991 GMC R3500 Base?

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.

What brands make parts for the 1991 GMC R3500 Base?

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.

How fast do 1991 GMC R3500 Base parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 1991 GMC R3500 Base parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

1991 GMC R3500(3,759 parts)

1991 GMC R3500(3,759 parts)

Shop by Problem

Other GMC R3500 Years

Base · Exhaust Systems (45 products)

Throttle Body Injection Flange Gasket

MANIFOLD AIR TUBE

Oxygen Sensor

Kooks BB Chevy 2 3/8in BBC Flange 5in Spacing (Bank)

Standard EPA Direct Fit Catalytic Converter 3" Inlet (ID) 3" Outlet (OD)

Exhaust Flange Spring-0.825 OD x 1.135 ID x 1.57 And 0.5 ID X .75 x OD 1.13 In.

Exhaust Flange Spring - 0.50 In. ID x .75 In. OD x 1.13 In. Length

MANIFOLD AIR TUBE

Exhaust Tail Pipe 2.25" Inlet (ID) 2.25" Outlet (OD)

Exhaust Flange Hardware - Stud, Spring And Nut - 3/8-16 x 3.5 In.

Exhaust Clamp

OXYGEN SENSOR CONNECTOR

Kooks BB Chevy 2 1/8in SS BBC Flange (Bank)

Premium SmartLink™ Universal Oxygen (O2) Sensors

Walker Products 250-21001 Oxygen Sensor 1-W Direct Fit Narrow-Band

Kooks BB Chevy 2 1/4in SS BBC Flange (Bank)

Standard EPA Direct Fit Catalytic Converter 3" Inlet (OD) 3" Outlet (OD)

CalCat CARB Universal Catalytic Converter 3" Inlet (ID) 3" Outlet (ID)

Exhaust Pipe Flange Gasket

Kooks SB Chevy 1 5/8in St. Fast Burn Chevy Flange (Bank)

Frequently Asked Questions

Do these parts fit my 1991 GMC R3500 Base?

What exhaust systems options are available for my 1991 GMC R3500 Base?

What brands make parts for the 1991 GMC R3500 Base?

How fast do 1991 GMC R3500 Base parts ship?

What warranty do your 1991 GMC R3500 Base parts come with?