21+ 1978 GMC Caballero Exhaust Systems Diablo Parts

Diablo · Exhaust Systems (21 products)

Exact-fit parts for the 1978 GMC Caballero Diablo.

Exhaust Tail Pipe 2" Inlet (OD) 2" Outlet (OD)

Walker Exhaust

Fits with Conditions

Exhaust Tail Pipe 2" Inlet (OD) 2" Outlet (OD)

$20.77

Mahle

Fits with Conditions

Exhaust Pipe Flange Gasket

$11.27

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

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.

$6.55

Exhaust Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

Dorman

Fits with Conditions

Exhaust Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

$9.21

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

Dorman

Fits with Conditions

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

$6.29

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

Walker Exhaust

Fits with Conditions

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

$73.26

Walker Exhaust

Fits with Conditions

Exhaust Clamp

$2.93

Dorman

Fits with Conditions

Exhaust Stud Kit - 3/8-16 x 2-1/2 In.

$5.92

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

AP Exhaust

Fits with Conditions

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

$59.78

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

Dorman

Fits with Conditions

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

$5.53

Dorman

Fits with Conditions

Exhaust Stud Kit - 3/8-16 x 3-5/16 In.

$9.10

UMI Performance

Confirmed Fit

UMI Performance 78-87 GM G-Body AC/Heater Box Delete Panel - Black

$76.15

Manifold Bolt and Spring Kit - 3/8-16 x 2-13/16 In.

Dorman

Fits with Conditions

Manifold Bolt and Spring Kit - 3/8-16 x 2-13/16 In.

$8.44

Manifold Bolt and Spring Kit 3/8-16X1-3/4 In.

Dorman

Fits with Conditions

Manifold Bolt and Spring Kit 3/8-16X1-3/4 In.

$7.87

Walker Exhaust

Fits with Conditions

Exhaust Flange

$7.73

Reinz

Fits with Conditions

Exhaust Pipe Flange Gasket

$3.88

Reinz

Fits with Conditions

Exhaust Pipe Flange Gasket

$3.15

Reinz

Fits with Conditions

Exhaust Pipe Flange Gasket

$5.64

UMI Performance

Confirmed Fit

UMI Performance 78-87 GM G-Body AC/Heater Box Delete Panel

$54.39

Reinz

Fits with Conditions

Exhaust Pipe Flange Gasket

$5.68

Frequently Asked Questions

Do these parts fit my 1978 GMC Caballero Diablo?

This page groups parts listed for the 1978 GMC Caballero Diablo. 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 1978 GMC Caballero Diablo?

We offer a wide selection of exhaust systems parts for the 1978 GMC Caballero Diablo. 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 1978 GMC Caballero Diablo?

We carry parts from trusted brands including Dorman, Reinz, Walker Exhaust, UMI Performance, and AP Exhaust, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 1978 GMC Caballero Diablo 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 1978 GMC Caballero Diablo 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.

1978 GMC Caballero(1,592 parts)

1978 GMC Caballero(1,592 parts)

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Other GMC Caballero Years

Diablo · Exhaust Systems (21 products)

Exhaust Tail Pipe 2" Inlet (OD) 2" Outlet (OD)

Exhaust Pipe Flange Gasket

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 Stud Kit 3/8-16 x 2-1/2 In. and 3/8-16 x 3-1/4 In.

Exhaust Manifold Stud Kit - 3/8-16 x 3-1/4 In.

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

Exhaust Clamp

Exhaust Stud Kit - 3/8-16 x 2-1/2 In.

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

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

Exhaust Stud Kit - 3/8-16 x 3-5/16 In.

UMI Performance 78-87 GM G-Body AC/Heater Box Delete Panel - Black

Manifold Bolt and Spring Kit - 3/8-16 x 2-13/16 In.

Manifold Bolt and Spring Kit 3/8-16X1-3/4 In.

Exhaust Flange

Exhaust Pipe Flange Gasket

Exhaust Pipe Flange Gasket

Exhaust Pipe Flange Gasket

UMI Performance 78-87 GM G-Body AC/Heater Box Delete Panel

Exhaust Pipe Flange Gasket

Frequently Asked Questions

Do these parts fit my 1978 GMC Caballero Diablo?

What exhaust systems options are available for my 1978 GMC Caballero Diablo?

What brands make parts for the 1978 GMC Caballero Diablo?

How fast do 1978 GMC Caballero Diablo parts ship?

What warranty do your 1978 GMC Caballero Diablo parts come with?