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Challenge LTW

AP Exhaust 2621 Exhaust Muffler

Brand	AP Exhaust 2621
Automotive Item Grade	Regular
Body Height	8.50
Body Length	20
Body Material	Aluminized steel
Body Width	11.50
Fitment	Oe replacement
Inlet Quantity	1
Inlet Type	Pipe
Mount Type	None
Muffler Color	Bare
Muffler Configuration	T
Muffler In. Dia. Designation	Id
Muffler Inlet Diameter 1 (in)	3.00
Muffler Inlet Location	Right center
Muffler Out. Dia. Designation	Id
Muffler Outlet Diameter (in)	3.00
Muffler Outlet Location	Lower center
Muffler Outlet Quantity	1
Muffler Overall Length	25
Muffler Reversible	No
Muffler Shape	Oval
Muffler Type	Baffled
Outlet Type	Pipe
Series	Challenge
Product line	Challenge LTW
Fits	Chevrolet and GMC · 50 vehicles

OE replacement. Direct-fit exhaust muffler for straightforward installation.

Aluminized steel body. Helps resist corrosion in demanding exhaust conditions.

Baffled oval design. Delivers controlled exhaust flow and sound.

Cross-references 23377841, 23377842 and 23377843 for the same application. See all 4.

$109.88Free shipping

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AP Exhaust Challenge LTW Muffler for Silverado and Sierra

AP Exhaust Challenge LTW Part Number 2621 is an OE replacement exhaust muffler built for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications. It uses an aluminized steel body with a baffled oval design and 3.00-inch inlet and outlet sizing for direct exhaust system service.

The Challenge LTW line focuses on replacement fitment for welded OE systems, making it a practical choice when servicing the factory exhaust on 2014-2023 Silverado 1500 and Sierra 1500 trucks. AP Exhaust 2621 is listed for multiple engine and model-year combinations, including 4.3L and 5.3L applications.

Key Features

AP Exhaust Challenge LTW series muffler
Part Number: 2621
OE replacement fitment for welded factory exhaust systems
Aluminized steel body construction
Oval, baffled muffler design
3.00-inch inlet and 3.00-inch outlet
Right center inlet and lower center outlet locations
Body dimensions: 8.50 in. high, 11.50 in. wide, 20 in. long
Overall muffler length: 25 in.
Non-reversible configuration

Product Details

This muffler is part of AP Exhaust’s Challenge LTW line, a replacement-focused product line for light truck and SUV exhaust service. The oval, baffled construction and aluminized steel body are suited to factory-style exhaust repair where the original system was welded in place. AP Exhaust 2621 is a direct-fit style muffler for Silverado 1500 and Sierra 1500 trucks across the listed model years.

This part cross-references Monroe Shocks & Struts (e.g., 23377841, 23377842) for the same application.

What It Is Used For

Replacing a damaged or rusted factory muffler
Servicing welded OE exhaust assemblies on Silverado 1500 and Sierra 1500 trucks
Restoring exhaust flow path after muffler failure
Addressing exhaust noise caused by internal muffler wear
Repairing a leaking or corroded rear exhaust section

Installation Notes and Tips

Compatible With 2019-2023 Chevrolet Silverado 1500, N/A
Compatible With 2019-2023 GMC Sierra 1500, N/A
Compatible With 2014-2018 Chevrolet Silverado 1500, N/A, 4.3L Engine
Compatible With 2014-2018 Chevrolet Silverado 1500, N/A, 5.3L Engine
Compatible With 2014-2018 GMC Sierra 1500, N/A, 4.3L Engine
Compatible With 2014-2018 GMC Sierra 1500, N/A, 5.3L Engine
Because the OE system was a welded assembly, related exhaust parts noted in the fitment data should be replaced as needed during service.
Verify inlet and outlet diameter, location, and overall muffler length against the existing exhaust before installation.

Quality Assurance

AP Exhaust manufactures replacement exhaust components for OE-style service applications. Part Number 2621 is built to match the listed Challenge LTW fitments for Chevrolet Silverado 1500 and GMC Sierra 1500 trucks from 2014-2023.

This part fits 50 vehicles

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

Year	Make	Model	Drive Type	Liters	Cylinders	Position	Notes
2023	Chevrolet	Silverado 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2023	GMC	Sierra 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2022	Chevrolet	Silverado 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2022	GMC	Sierra 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2021	Chevrolet	Silverado 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2021	GMC	Sierra 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2020	Chevrolet	Silverado 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2020	GMC	Sierra 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2019	Chevrolet	Silverado 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2019	GMC	Sierra 1500	—	5.3L	V8	N/A	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; Challenge LTW
2018	Chevrolet	Silverado 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2018	Chevrolet	Silverado 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2018	Chevrolet	Silverado 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2018	Chevrolet	Silverado 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2018	GMC	Sierra 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2018	GMC	Sierra 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2018	GMC	Sierra 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2018	GMC	Sierra 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2017	Chevrolet	Silverado 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2017	Chevrolet	Silverado 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2017	Chevrolet	Silverado 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2017	Chevrolet	Silverado 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2017	GMC	Sierra 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2017	GMC	Sierra 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2017	GMC	Sierra 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2017	GMC	Sierra 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2016	Chevrolet	Silverado 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2016	Chevrolet	Silverado 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2016	Chevrolet	Silverado 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2016	Chevrolet	Silverado 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2016	GMC	Sierra 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2016	GMC	Sierra 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2016	GMC	Sierra 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2016	GMC	Sierra 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2015	Chevrolet	Silverado 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2015	Chevrolet	Silverado 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2015	Chevrolet	Silverado 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2015	Chevrolet	Silverado 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2015	GMC	Sierra 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2015	GMC	Sierra 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2015	GMC	Sierra 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2015	GMC	Sierra 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2014	Chevrolet	Silverado 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2014	Chevrolet	Silverado 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2014	Chevrolet	Silverado 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2014	Chevrolet	Silverado 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2014	GMC	Sierra 1500	4WD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2014	GMC	Sierra 1500	RWD	5.3L	V8	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 5.3L Engine
2014	GMC	Sierra 1500	4WD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
2014	GMC	Sierra 1500	RWD	4.3L	V6	N/A	Challenge LTW; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 1500 Silverado/Sierra; 4.3L Engine
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Directly replaces or cross-references 4 part numbers

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

23377841233778422337784323377844