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2003 GMC Envoy XL

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Walker 21421 Exhaust Muffler
for 2003 GMC Envoy XL

Walker 21421 Exhaust Muffler - 2003 GMC Envoy XL
Walker 21421 Exhaust Muffler - 2003 GMC Envoy XL Image 1
Walker 21421 Exhaust Muffler - 2003 GMC Envoy XL

Walker
Brand:Walker
Part Number: 21421
UPC: 086387214216
Weight: 25 lbs
Condition:New



On Sale:

$137.97

Availability:
4 in Stock
Warehouse: US-7
Quantity:

Product Information

Description:

QUIET-FLOW3 MUFFLER

The only broad-market muffler with 100% stainless-steel construction, Walker Quiet-Flow SS mufflers feature precision fit, superior flow and OE-style sound. Quiet-Flow SS mufflers are available for most domestic and import vehicles.

Features and Benefits:

  • BUILT TO LAST -- Internal partitions and mechanically joined tubes allow expansion and contraction during temperature changes to minimize distortion while spun-locked heads and OE-style spot welds provide stability and longer service life
  • BUY WITH CONFIDENCE -- Comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.
  • CORROSION RESISTANT STAINLESS STEEL -- The only broad-market muffler with 100% stainless-steel construction that delivers longer life versus aluminized mufflers while an internal drainage system reduces moisture collection
  • DESIGN VALIDATED -- Acoustic and flow tested for quality OE-style sound you can count on
  • EASY TO INSTALL -- Direct-fit bolt-on replacement solution with OE-style hangers, brackets and pipe routings for easy installation and doesn't require specialized fabrication and/or welding
  • PREMIUM ACOUSTIC CONTROL -- OE-style louvered tubes lower noise levels while OE-style domed heads help reduce radiated noise for premium factory-style sound quality compared to straight perforated tubes

Specifications:

Body Height:
5.5 in.
Body Length:
27 in.
Body Material:
Stainless Steel
Body Width:
11 in.
Finish:
Aluminized
Grade Type:
Regular
Inlet 1 Type:
2 Bolt Welded Flange
Inlet Configuration:
Center
Inlet Quantity:
1
Inlet Type:
2 Bolt Welded Flange
Muffler Type:
Combination
Outlet 1 Inside Diameter:
2.5 in.
Outlet 1 Type:
Pipe Connection
Outlet Configuration:
Offset
Outlet Inside Diameter:
2.5 in.
Outlet Quantity:
1
Outlet Type:
Pipe Connection
Overall Length:
44.38 in.
Reversible:
No
Shape:
Oval
Tunable:
No
Universal Or Specific Fit:
Specific
AP Exhaust #:
2405
AP Exhaust #:
28695
Bosal #:
166-645
Bosal #:
166-647
Country of Origin:
US

Walker 21421 Exhaust Muffler compatibility with your 2003 GMC Envoy XL...

Last Updated: 12/24/2023

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

2005

 

2004

 

2003

 

2005

 

2004

 

2003

 
GMC Envoy XL

5.3L V8 Gas OHV
1
 
Front
 
Quiet-Flow SS
Premium
Limited Lifetime Warranty
If welded assembly, replace all required parts
 

GMC Envoy XL



5.3L V8 Gas OHV

Front Quiet-Flow SS
Premium
Limited Lifetime Warranty
If welded assembly, replace all required parts

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2005

 

2004

 

2003

 

2002

 
GMC Envoy XL

4.2L L6 Gas DOHC
1
 
 
Quiet-Flow SS
Premium
Limited Lifetime Warranty
If welded assembly, replace all required parts
 

GMC Envoy XL



4.2L L6 Gas DOHC Quiet-Flow SS
Premium
Limited Lifetime Warranty
If welded assembly, replace all required parts

1 Per Vehicle

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