Walker 18229 Exhaust Muffler

Brand	Walker 18229
Universal Or Specific Fit	Specific
Shape	Oval
Grade Type	Regular
Inlet Inside Diameter	3
Body Width	9.75
Inlet Quantity	1
Outlet Inside Diameter	3
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	29
Body Height	4.25
Body Length	24
Body Material	Steel
Finish	Aluminized
Inlet 1 Inside Diameter	3
Inlet 1 Type	Pipe connection
Inlet Configuration	Offset
Inlet Offset	2.875
Inlet Type	Pipe connection
Muffler Type	Combination
Outlet 1 Inside Diameter	3
Outlet 1 Type	Pipe connection
Outlet Configuration	Center
Outlet Type	Pipe connection
Product line	SoundFX Direct Fit
Fits	Chevrolet and GMC · 52 vehicles

Direct-fit design. Installs as a specific-fit exhaust muffler with no modifications needed.

Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

Mechanical interior joints. Spun-locked heads add durability and a quality appearance.

Cross-references AP Exhaust 700126, AP Exhaust 700141 and AP Exhaust 700204 for the same application. See all 7.

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Walker SoundFX Direct Fit Muffler for GM Vans and SUVs

Walker SoundFX Direct Fit muffler Part Number 18229 is a specific-fit exhaust muffler built for select Chevrolet and GMC applications from 1987-1991. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped to deliver a clean OE-style appearance with controlled exhaust sound.

Key Features

Specific-fit exhaust muffler for select Chevrolet Blazer, G10, G20, G30, GMC Jimmy, G1500, G2500, and G3500 applications
Oval muffler body with 3-inch inlet and 3-inch outlet
Offset inlet and center outlet configuration
Aluminized steel construction for corrosion resistance and longer service life
Mechanical interior joints and spun-locked heads for added durability
Walker SoundFX Direct Fit line for OE-style replacement on exhaust repair jobs
Part Number 18229 for application matching and catalog lookup

Product Details

Walker SoundFX Direct Fit Part Number 18229 is a combination-style exhaust muffler with a 29-inch overall length, 24-inch body length, 9.75-inch body width, and 4.25-inch body height. The oval steel body is finished in aluminized coating and uses pipe-connection inlet and outlet ends for direct replacement on listed vehicles. This muffler is a practical choice for restoring exhaust function on 1987-1991 Chevrolet Blazer and GMC Jimmy models, as well as Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 vans with the specified exhaust configurations.

The Walker SoundFX Direct Fit line is built for repair work where fit, appearance, and sound control matter. If you are replacing a worn muffler on a Chevrolet G20 or GMC G2500 with the listed emissions and catalytic converter setup, Part Number 18229 provides a direct-fit solution that follows the original exhaust layout.

This part cross-references AP Exhaust 700126 and TYC 700121 for the same application.

What It Helps Fix

Exhaust noise from a rusted or internally damaged muffler
Restricted exhaust flow caused by corrosion or collapse inside the muffler
Leaks at the muffler body or pipe connection points
Fitment issues when replacing an OE-style muffler on select Chevrolet and GMC vehicles
Exhaust system wear on high-mileage GM vans and SUVs

Installation Notes and Tips

Verify inlet and outlet sizing, offset inlet placement, and center outlet routing before installation. This muffler is not reversible and is not tunable, so orientation matters during exhaust alignment. For welded assemblies, replace all required parts as noted in the fitment data to ensure proper system fit. Confirm the vehicle’s emissions configuration, catalytic converter setup, and exhaust system layout before ordering.

Fits 1987-1991 Chevrolet Blazer, N/A, with 3-inch inlet
Fits 1987-1991 Chevrolet G10, N/A
Fits 1987-1991 GMC G1500, N/A
Fits 1987-1991 GMC Jimmy, N/A, with 3-inch inlet
Fits 1987-1990 Chevrolet G20, N/A, Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter
Fits 1987-1990 GMC G2500, N/A, Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter
Fits 1987-1990 Chevrolet G30, N/A, with Single Catalytic Converter; without California Emission System
Fits 1987-1990 GMC G3500, N/A, with Single Catalytic Converter; without California Emission System
Fits 1991 Chevrolet G20, N/A, with Light Duty Emissions; with Single Catalytic Converter
Fits 1991 Chevrolet G30, N/A, with 3-inch system
Fits 1991 GMC G2500, N/A, with Light Duty Emissions; with Single Catalytic Converter
Fits 1991 GMC G3500, N/A, with 3-inch system

Quality Assurance

Walker builds SoundFX Direct Fit mufflers with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in exhaust service. Part Number 18229 is engineered as a direct-fit replacement for the listed Chevrolet and GMC applications.

This part fits 52 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Drive Type	Liters	Cylinders	Wheel Base	Position	Notes
1991	Chevrolet	Blazer	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	G10	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	G20	—	5.7L	V8	125.0"	N/A	with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	G30	—	4.3L	V6	125.0"	N/A	with 3 (in) System; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	G30	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	G30	—	5.7L	V8	146.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	G1500	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	G2500	—	5.7L	V8	125.0"	N/A	with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	G3500	—	4.3L	V6	125.0"	N/A	with 3 (in) System; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	G3500	—	5.7L	V8	146.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	G3500	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	Jimmy	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	Blazer	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	G10	—	5.7L	V8	110.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	G20	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	G30	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	G30	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	G1500	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	G2500	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	G3500	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	G3500	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	Jimmy	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	Blazer	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	G10	—	5.7L	V8	110.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	G20	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	G30	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	G30	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	G1500	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	G2500	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	G3500	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	G3500	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	Jimmy	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	Blazer	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	G10	—	5.7L	V8	125.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	G20	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	G30	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	G30	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	G1500	—	5.7L	V8	110.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	G2500	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	G3500	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	G3500	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	Jimmy	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	Blazer	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	G10	—	5.7L	V8	110.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	G20	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	G30	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	G30	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	G1500	—	5.7L	V8	110.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	G2500	—	5.7L	V8	125.0"	N/A	Single Pipe replaces OE Split Design; with Light Duty Emissions; with Single Catalytic Converter; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	G3500	—	5.7L	V8	146.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	G3500	—	5.7L	V8	125.0"	N/A	with Single Catalytic Converter; without California Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	Jimmy	4WD	5.7L	V8	—	N/A	with 3 (in) Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
No rows match your filter.

Directly replaces or cross-references 7 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

AP Exhaust — 700126AP Exhaust — 700141AP Exhaust — 700204TYC — 700121TYC — 700203TYC — 700205709997