57+ 1991 GMC K1500 Exhaust Systems Sierra SLX Parts

Sierra SLX · Exhaust Systems (57 products)

Exact-fit parts for the 1991 GMC K1500 Sierra SLX.

Standard Motor Products

Part # FJG102

Fits with Conditions

Throttle Body Injection Flange Gasket

$7.74

AP Exhaust

Part # 54788

Fits with Conditions

Exhaust Tail Pipe

$32.60

AP Exhaust

Part # 28241

Fits with Conditions

Prebent Exhaust Pipe

$40.38

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

Walker Exhaust

Part # 45307

Fits with Conditions

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

$37.54

AP Exhaust

Part # 64811

Fits with Conditions

Exhaust Tail Pipe

$38.89

Walker Exhaust

Part # 45308

Fits with Conditions

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

$36.98

Exhaust Pipe 3" Inlet (ID) 3" Outlet (OD)

Walker Exhaust

Part # 44461

Fits with Conditions

Exhaust Pipe 3" Inlet (ID) 3" Outlet (OD)

$47.81

AP Exhaust

Part # M212

Fits with Conditions

Exhaust Clamp

$6.71

Federal / EPA Catalytic Converter - Universal

Eastern Catalytic

Part # 70330

Fits with Conditions

Federal / EPA Catalytic Converter - Universal

$73.42

CARB Compliant Universal Pre-OBDII Converter

AP Exhaust

Part # 98237

Fits with Conditions

CARB Compliant Universal Pre-OBDII Converter

$289.44

Eastern Catalytic

Part # 70857

Fits with Conditions

Federal / EPA Catalytic Converter - Universal

$244.67

Exhaust Pipe 3" Inlet (ID) 2.5" Outlet (OD)

Walker Exhaust

Part # 44247

Fits with Conditions

Exhaust Pipe 3" Inlet (ID) 2.5" Outlet (OD)

$42.19

AP Exhaust

Part # 28591

Fits with Conditions

Prebent Exhaust Pipe

$25.75

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

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

Walker Exhaust

Part # 15042

Fits with Conditions

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

$141.45

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

Four Seasons

Part # 35334

Fits with Conditions

Flanged Vented CW Blower Motor w/ Wheel

$39.59

Walker Products

Part # 350-31027

Fits with Conditions

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

$31.89

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

Walker Exhaust

Part # 43297

Fits with Conditions

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

$21.71

Frequently Asked Questions

Do these parts fit my 1991 GMC K1500 Sierra SLX?

This page groups parts listed for the 1991 GMC K1500 Sierra SLX. 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 K1500 Sierra SLX?

We offer a wide selection of exhaust systems parts for the 1991 GMC K1500 Sierra SLX. 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 K1500 Sierra SLX?

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

How fast do 1991 GMC K1500 Sierra SLX 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 K1500 Sierra SLX 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 K1500(4,386 parts)

1991 GMC K1500(4,386 parts)

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Other GMC K1500 Years

Sierra SLX · Exhaust Systems (57 products)

Throttle Body Injection Flange Gasket

Exhaust Tail Pipe

Prebent Exhaust Pipe

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

Exhaust Tail Pipe

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

Exhaust Pipe 3" Inlet (ID) 3" Outlet (OD)

Exhaust Clamp

Federal / EPA Catalytic Converter - Universal

CARB Compliant Universal Pre-OBDII Converter

Federal / EPA Catalytic Converter - Universal

Exhaust Pipe 3" Inlet (ID) 2.5" Outlet (OD)

Prebent Exhaust Pipe

Oxygen Sensor Connector

Federal / EPA Direct-Fit Converter Assembly

Standard EPA Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

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

Flanged Vented CW Blower Motor w/ Wheel

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

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

Frequently Asked Questions

Do these parts fit my 1991 GMC K1500 Sierra SLX?

What exhaust systems options are available for my 1991 GMC K1500 Sierra SLX?

What brands make parts for the 1991 GMC K1500 Sierra SLX?

How fast do 1991 GMC K1500 Sierra SLX parts ship?

What warranty do your 1991 GMC K1500 Sierra SLX parts come with?