50+ 1990 GMC R3500 Exhaust Systems Base Parts

Base · Exhaust Systems (50 products)

Exact-fit parts for the 1990 GMC R3500 Base.

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

Walker Exhaust

Part # 31520

Fits with Conditions

Exhaust Pipe Flange Gasket

$16.67

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

Dorman

Part # 03110

Fits with Conditions

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

$12.91

Standard Motor Products

Part # HP7340

Fits with Conditions

Oxygen Sensor Connector

$13.89

Federal / EPA Direct-Fit Converter Assembly

Eastern Catalytic

Part # 50298

Fits with Conditions

Federal / EPA Direct-Fit Converter Assembly

$316.61

AP Exhaust

Part # M212

Fits with Conditions

Exhaust Clamp

$6.71

Four Seasons

Part # 35334

Fits with Conditions

Flanged Vented CW Blower Motor w/ Wheel

$39.59

Standard Motor Products

Part # AT160

Fits with Conditions

MANIFOLD AIR TUBE

$121.25

Exhaust Pipe Connector 2.5" Inlet (ID) 2.5" Outlet (OD)

Walker Exhaust

Part # 41966

Fits with Conditions

Exhaust Pipe Connector 2.5" Inlet (ID) 2.5" Outlet (OD)

$15.28

Flanged Vented CW Blower Motor w/o Wheel

Four Seasons

Part # 35472

Fits with Conditions

Flanged Vented CW Blower Motor w/o Wheel

$40.35

DEI 88-98 Chevrolet/GMC C/K Extended Cab 12mm D-Mat Roof Insulation Kit

DEI

Part # 50299

Confirmed Fit

DEI 88-98 Chevrolet/GMC C/K Extended Cab 12mm D-Mat Roof Insulation Kit

$34.69

Standard Motor Products

Part # AT163

Fits with Conditions

MANIFOLD AIR TUBE

$38.60

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

Kooks Headers

Part # 7034-S

Confirmed Fit

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

$85.62

AP Exhaust

Part # H300

Fits with Conditions

Exhaust Clamp

$9.10

Standard Motor Products

Part # AT161

Fits with Conditions

MANIFOLD AIR TUBE

$163.03

Federal / EPA Catalytic Converter - Universal Pre-OBDII Super Duty

AP Exhaust

Part # 606007

Fits with Conditions

Federal / EPA Catalytic Converter - Universal Pre-OBDII Super Duty

$257.08

Delphi

Part # ES10966

Fits with Conditions

Oxygen Sensor

$21.41

Walker Products

Part # 350-31027

Fits with Conditions

Walker Products 350-31027 Oxygen Sensor 1-W Direct Fit Narrow-Band

$31.89

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

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

Frequently Asked Questions

Do these parts fit my 1990 GMC R3500 Base?

This page groups parts listed for the 1990 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 1990 GMC R3500 Base?

We offer a wide selection of exhaust systems parts for the 1990 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 1990 GMC R3500 Base?

We carry parts from trusted brands including Kooks Headers, Standard Motor Products, Walker Exhaust, AP Exhaust, and Dorman, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 1990 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 1990 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.

1990 GMC R3500(3,815 parts)

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Other GMC R3500 Years

1990 GMC R3500(3,815 parts)

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Other GMC R3500 Years

Base · Exhaust Systems (50 products)

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

Exhaust Pipe Flange Gasket

Manifold Bolt and Spring Kit - 3/8-16 x 3.5 In.

Oxygen Sensor Connector

Federal / EPA Direct-Fit Converter Assembly

Exhaust Clamp

Flanged Vented CW Blower Motor w/ Wheel

MANIFOLD AIR TUBE

Exhaust Pipe Connector 2.5" Inlet (ID) 2.5" Outlet (OD)

Flanged Vented CW Blower Motor w/o Wheel

DEI 88-98 Chevrolet/GMC C/K Extended Cab 12mm D-Mat Roof Insulation Kit

MANIFOLD AIR TUBE

Kooks SB Chevy 1 7/8in SS 23deg SBC Stahl Flange (Bank)

Exhaust Clamp

MANIFOLD AIR TUBE

Federal / EPA Catalytic Converter - Universal Pre-OBDII Super Duty

Oxygen Sensor

Walker Products 350-31027 Oxygen Sensor 1-W Direct Fit Narrow-Band

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

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

Frequently Asked Questions

Do these parts fit my 1990 GMC R3500 Base?

What exhaust systems options are available for my 1990 GMC R3500 Base?

What brands make parts for the 1990 GMC R3500 Base?

How fast do 1990 GMC R3500 Base parts ship?

What warranty do your 1990 GMC R3500 Base parts come with?