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Walker 21687 Exhaust Resonator

Walker 21687 Exhaust Resonator
Walker 21687 Exhaust Resonator Image 1
Walker 21687 Exhaust Resonator

Walker
Brand:Walker
Part Number: 21687
UPC: 086387216876
Weight: 6 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

RESONATOR

Designed to fit, perform and sound like the original system, Walker resonators use precise tuning technologies to deliver excellent flow characteristics and OE-style sound.

Features and Benefits:

  • FACTORY SOUND -- OE-style louvered tubes (where applicable) help reduce radiated noise for factory-style sound
  • FLEXIBLE SOLUTION -- Customizable design for easy fitment and may require specialized fabrication and/or welding for installation
  • GET MORE MILES FROM YOUR RESONATOR -- Engineered to fit, perform and sound like the original system
  • RESISTS CORROSION -- Durable aluminized steel construction and helps reduce corrosion
  • STRONG AND DURABLE -- Features thick OE-style flanges, hardware and brackets for strength

Specifications:

Body 1 Height:
4 in.
Body 1 Length:
14 in.
Body 1 Shape:
Round
Body 1 Width:
4 in.
Body Height:
4 in.
Body Length:
14 in.
Body Material:
Steel
Body Width:
4 in.
Finish:
Aluminized
Inlet Configuration:
Center
Inlet Inside Diameter:
2.25 in.
Inlet Quantity:
1
Inlet Type:
Pipe Connection
Outlet Configuration:
Center
Outlet Inside Diameter:
2.25 in.
Outlet Outside Diameter:
2.25 in.
Outlet Quantity:
1
Outlet Type:
Pipe Connection
Resonator Shape:
Round
Universal Or Specific Fit:
Direct Fit
AP Exhaust #:
2991
AP Exhaust #:
3220
Country of Origin:
US

Select a vehicle to narrow Walker 21687 Exhaust Resonator fitment info!

Last Updated: 12/24/2023

Years Vehicle Per Vehicle Fit NotesFitment Notes
Buick Centurion

5.7L V8 Gas OHV
1
 
with 3.42 Axle Ratio
 

Buick Centurion



5.7L V8 Gas OHV with 3.42 Axle Ratio

1 Per Vehicle
Buick Centurion

7.5L V8 Gas OHV
1
 
with Single Exhaust
 

Buick Centurion



7.5L V8 Gas OHV with Single Exhaust

1 Per Vehicle
Buick Centurion

7.5L V8 Gas OHV
2
 
with Dual Exhaust
Left Hand and Right Hand
 

Buick Centurion



7.5L V8 Gas OHV with Dual Exhaust
Left Hand and Right Hand

2 Per Vehicle
Buick Electra

5.0L V8 Gas OHV
1
 
 

Buick Electra



5.0L V8 Gas OHV
1 Per Vehicle
Buick Electra

5.7L V8 Gas OHV
1
 
Eng Ver: Oldsmobile
8th VIN Digit: R
 

Buick Electra



5.7L V8 Gas OHV Eng Ver: Oldsmobile
8th VIN Digit: R

1 Per Vehicle
Buick Electra

7.5L V8 Gas OHV
1
 
with Single Exhaust
 

Buick Electra



7.5L V8 Gas OHV with Single Exhaust

1 Per Vehicle
Buick Electra

7.5L V8 Gas OHV
2
 
with Dual Exhaust
 

Buick Electra



7.5L V8 Gas OHV with Dual Exhaust

2 Per Vehicle
Buick Estate Wagon

5.0L V8 Gas OHV
1
 
 

Buick Estate Wagon



5.0L V8 Gas OHV
1 Per Vehicle
Buick Estate Wagon

5.7L V8 Gas OHV
1
 
Eng Ver: Oldsmobile
8th VIN Digit: R
 

Buick Estate Wagon



5.7L V8 Gas OHV Eng Ver: Oldsmobile
8th VIN Digit: R

1 Per Vehicle
Buick Estate Wagon

6.6L V8 Gas OHV
1
 
 

Buick Estate Wagon



6.6L V8 Gas OHV
1 Per Vehicle
Buick LeSabre

5.0L V8 Gas OHV
1
 
 

Buick LeSabre



5.0L V8 Gas OHV
1 Per Vehicle
Buick LeSabre

7.5L V8 Gas OHV
1
 
with Single Exhaust
 

Buick LeSabre



7.5L V8 Gas OHV with Single Exhaust

1 Per Vehicle
Buick LeSabre

5.7L V8 Gas OHV
1
 
with 3.42 Axle Ratio
 

Buick LeSabre



5.7L V8 Gas OHV with 3.42 Axle Ratio

1 Per Vehicle
Buick LeSabre

7.5L V8 Gas OHV
2
 
with Dual Exhaust
Left Hand and Right Hand
 

Buick LeSabre



7.5L V8 Gas OHV with Dual Exhaust
Left Hand and Right Hand

2 Per Vehicle
Buick Riviera

7.5L V8 Gas OHV
2
 
Left Hand and Right Hand
 

Buick Riviera



7.5L V8 Gas OHV Left Hand and Right Hand

2 Per Vehicle
Buick Roadmaster

5.7L V8 Gas OHV
1
 
If welded assembly, replace all required parts
Wagon
 

Buick Roadmaster



5.7L V8 Gas OHV If welded assembly, replace all required parts
Wagon

1 Per Vehicle
Buick Roadmaster

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
 

Buick Roadmaster



5.0L V8 Gas OHV If welded assembly, replace all required parts

1 Per Vehicle
Cadillac Calais

7.7L V8 Gas OHV
1
 
 

Cadillac Calais



7.7L V8 Gas OHV
1 Per Vehicle
Cadillac DeVille

7.7L V8 Gas OHV
1
 
 

Cadillac DeVille



7.7L V8 Gas OHV
1 Per Vehicle
Cadillac Eldorado

8.2L V8 Gas OHV
1
 
 

Cadillac Eldorado



8.2L V8 Gas OHV
1 Per Vehicle
Cadillac Fleetwood

7.7L V8 Gas OHV
1
 
 

Cadillac Fleetwood



7.7L V8 Gas OHV
1 Per Vehicle
Chevrolet Bel Air

6.6L V8 Gas OHV
1
 
Sedan
 

Chevrolet Bel Air



6.6L V8 Gas OHV Sedan

1 Per Vehicle
Chevrolet Bel Air

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
Sedan
 

Chevrolet Bel Air



7.4L V8 Gas OHV Left Hand and Right Hand
Sedan

2 Per Vehicle
Chevrolet Bel Air

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Coupe
 

Chevrolet Bel Air



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Coupe

2 Per Vehicle
Chevrolet Bel Air

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Sedan
 

Chevrolet Bel Air



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Sedan

2 Per Vehicle
Chevrolet Caprice

5.7L V8 Gas OHV
1
 
If welded assembly, replace all required parts
Wagon
 

Chevrolet Caprice



5.7L V8 Gas OHV If welded assembly, replace all required parts
Wagon

1 Per Vehicle
Chevrolet Caprice

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
Wagon
 

Chevrolet Caprice



5.0L V8 Gas OHV If welded assembly, replace all required parts
Wagon

1 Per Vehicle
Chevrolet Caprice

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
8th VIN Digit: E
Wagon
 

Chevrolet Caprice



5.0L V8 Gas OHV If welded assembly, replace all required parts
8th VIN Digit: E
Wagon

1 Per Vehicle
Chevrolet Caprice

5.0L V8 Gas OHV
1
 
8th VIN Digit: Y
Wagon
 

Chevrolet Caprice



5.0L V8 Gas OHV 8th VIN Digit: Y
Wagon

1 Per Vehicle
Chevrolet Caprice

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
8th VIN Digit: H
Wagon
 

Chevrolet Caprice



5.0L V8 Gas OHV If welded assembly, replace all required parts
8th VIN Digit: H
Wagon

1 Per Vehicle
Chevrolet Caprice

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
Wagon
 

Chevrolet Caprice



5.0L V8 Gas OHV If welded assembly, replace all required parts
Wagon

1 Per Vehicle
Chevrolet Caprice

6.6L V8 Gas OHV
1
 
Coupe
 

Chevrolet Caprice



6.6L V8 Gas OHV Coupe

1 Per Vehicle
Chevrolet Caprice

6.6L V8 Gas OHV
1
 
Sedan
 

Chevrolet Caprice



6.6L V8 Gas OHV Sedan

1 Per Vehicle
Chevrolet Caprice

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
 

Chevrolet Caprice



7.4L V8 Gas OHV Left Hand and Right Hand

2 Per Vehicle
Chevrolet Caprice

6.6L V8 Gas OHV
1
 
Convertible
 

Chevrolet Caprice



6.6L V8 Gas OHV Convertible

1 Per Vehicle
Chevrolet Caprice

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Convertible
 

Chevrolet Caprice



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Convertible

2 Per Vehicle
Chevrolet Caprice

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Coupe
 

Chevrolet Caprice



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Coupe

2 Per Vehicle
Chevrolet Caprice

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Sedan
 

Chevrolet Caprice



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Sedan

2 Per Vehicle
Chevrolet Impala

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
 

Chevrolet Impala



7.4L V8 Gas OHV Left Hand and Right Hand

2 Per Vehicle
Chevrolet Impala

6.6L V8 Gas OHV
1
 
Coupe
 

Chevrolet Impala



6.6L V8 Gas OHV Coupe

1 Per Vehicle
Chevrolet Impala

6.6L V8 Gas OHV
1
 
Sedan
 

Chevrolet Impala



6.6L V8 Gas OHV Sedan

1 Per Vehicle
Chevrolet Impala

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
Coupe
 

Chevrolet Impala



7.4L V8 Gas OHV Left Hand and Right Hand
Coupe

2 Per Vehicle
Chevrolet Impala

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
Sedan
 

Chevrolet Impala



7.4L V8 Gas OHV Left Hand and Right Hand
Sedan

2 Per Vehicle
Chevrolet Impala

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Coupe
 

Chevrolet Impala



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Coupe

2 Per Vehicle
Chevrolet Impala

7.4L V8 Gas OHV
2
 
Left Hand and Right Hand
8th VIN Digit: Y
Sedan
 

Chevrolet Impala



7.4L V8 Gas OHV Left Hand and Right Hand
8th VIN Digit: Y
Sedan

2 Per Vehicle
Oldsmobile 98

7.5L V8 Gas OHV
1
 
 

Oldsmobile 98



7.5L V8 Gas OHV
1 Per Vehicle
Oldsmobile 98

7.5L V8 Gas OHV
1
 
with Single Exhaust
 

Oldsmobile 98



7.5L V8 Gas OHV with Single Exhaust

1 Per Vehicle
Oldsmobile 98

7.5L V8 Gas OHV
2
 
with Dual Exhaust
Left Hand and Right Hand
 

Oldsmobile 98



7.5L V8 Gas OHV with Dual Exhaust
Left Hand and Right Hand

2 Per Vehicle
Oldsmobile Custom Cruiser

5.7L V8 Gas OHV
1
 
If welded assembly, replace all required parts
 

Oldsmobile Custom Cruiser



5.7L V8 Gas OHV If welded assembly, replace all required parts

1 Per Vehicle
Oldsmobile Custom Cruiser

5.0L V8 Gas OHV
1
 
If welded assembly, replace all required parts
 

Oldsmobile Custom Cruiser



5.0L V8 Gas OHV If welded assembly, replace all required parts

1 Per Vehicle
Oldsmobile Custom Cruiser

5.0L V8 Gas OHV
1
 
 

Oldsmobile Custom Cruiser



5.0L V8 Gas OHV
1 Per Vehicle
Oldsmobile Custom Cruiser

5.7L V8 Gas OHV
1
 
 

Oldsmobile Custom Cruiser



5.7L V8 Gas OHV
1 Per Vehicle
Oldsmobile Custom Cruiser

6.6L V8 Gas OHV
1
 
 

Oldsmobile Custom Cruiser



6.6L V8 Gas OHV
1 Per Vehicle
Oldsmobile Delta 88

7.5L V8 Gas OHV
1
 
 

Oldsmobile Delta 88



7.5L V8 Gas OHV
1 Per Vehicle
Oldsmobile Delta 88

6.6L V8 Gas OHV
1
 
 

Oldsmobile Delta 88



6.6L V8 Gas OHV
1 Per Vehicle
Oldsmobile Delta 88

7.5L V8 Gas OHV
1
 
with Resonator
with Single Exhaust
8th VIN Digit: U
 

Oldsmobile Delta 88



7.5L V8 Gas OHV with Resonator
with Single Exhaust
8th VIN Digit: U

1 Per Vehicle
Oldsmobile Delta 88

7.5L V8 Gas OHV
2
 
with Dual Exhaust
Left Hand and Right Hand
8th VIN Digit: U
 

Oldsmobile Delta 88



7.5L V8 Gas OHV with Dual Exhaust
Left Hand and Right Hand
8th VIN Digit: U

2 Per Vehicle
Oldsmobile Delta 88

7.5L V8 Gas OHV
1
 
with Resonator
with Single Exhaust
8th VIN Digit: T
 

Oldsmobile Delta 88



7.5L V8 Gas OHV with Resonator
with Single Exhaust
8th VIN Digit: T

1 Per Vehicle
Oldsmobile Delta 88

7.5L V8 Gas OHV
2
 
with Dual Exhaust
Left Hand and Right Hand
8th VIN Digit: T
 

Oldsmobile Delta 88



7.5L V8 Gas OHV with Dual Exhaust
Left Hand and Right Hand
8th VIN Digit: T

2 Per Vehicle
Oldsmobile Toronado

6.6L V8 Gas OHV
1
 
 

Oldsmobile Toronado



6.6L V8 Gas OHV
1 Per Vehicle
Oldsmobile Toronado

7.5L V8 Gas OHV
2
 
Left Hand and Right Hand
 

Oldsmobile Toronado



7.5L V8 Gas OHV Left Hand and Right Hand

2 Per Vehicle
Pontiac Bonneville

5.0L V8 Gas OHV
1
 
with Resonator
Wagon
 

Pontiac Bonneville



5.0L V8 Gas OHV with Resonator
Wagon

1 Per Vehicle
Pontiac Bonneville

5.7L V8 Gas OHV
1
 
Eng Ver: Oldsmobile
8th VIN Digit: R
Wagon
 

Pontiac Bonneville



5.7L V8 Gas OHV Eng Ver: Oldsmobile
8th VIN Digit: R
Wagon

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV
1
 
 

Pontiac Bonneville



6.6L V8 Gas OHV
1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV
1
 
Wagon
 

Pontiac Bonneville



6.6L V8 Gas OHV Wagon

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV
1
 
8th VIN Digit: Z
Wagon
 

Pontiac Bonneville



6.6L V8 Gas OHV 8th VIN Digit: Z
Wagon

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV,
7.5L V8 Gas OHV
1
 
4BBL
Coupe
 

Pontiac Bonneville



6.6L V8 Gas OHV,
7.5L V8 Gas OHV 4BBL
Coupe

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV,
7.5L V8 Gas OHV
1
 
4BBL
Sedan
 

Pontiac Bonneville



6.6L V8 Gas OHV,
7.5L V8 Gas OHV 4BBL
Sedan

1 Per Vehicle
Pontiac Bonneville

7.5L V8 Gas OHV
1
 
Hardtop
 

Pontiac Bonneville



7.5L V8 Gas OHV Hardtop

1 Per Vehicle
Pontiac Bonneville

7.5L V8 Gas OHV
1
 
Sedan
 

Pontiac Bonneville



7.5L V8 Gas OHV Sedan

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV,
7.5L V8 Gas OHV
1
 
with Pontiac Engine
4BBL
Hardtop
 

Pontiac Bonneville



6.6L V8 Gas OHV,
7.5L V8 Gas OHV with Pontiac Engine
4BBL
Hardtop

1 Per Vehicle
Pontiac Bonneville

6.6L V8 Gas OHV,
7.5L V8 Gas OHV
1
 
with Pontiac Engine
4BBL
Sedan
 

Pontiac Bonneville



6.6L V8 Gas OHV,
7.5L V8 Gas OHV with Pontiac Engine
4BBL
Sedan

1 Per Vehicle
Pontiac Catalina

5.0L V8 Gas OHV
1
 
with Resonator
8th VIN Digit: Y
Wagon
 

Pontiac Catalina



5.0L V8 Gas OHV with Resonator
8th VIN Digit: Y
Wagon

1 Per Vehicle
Pontiac Catalina

5.7L V8 Gas OHV
1
 
8th VIN Digit: R
Wagon
 

Pontiac Catalina



5.7L V8 Gas OHV 8th VIN Digit: R
Wagon

1 Per Vehicle
Pontiac Catalina

6.6L V8 Gas OHV
1
 
with Resonator
Wagon
 

Pontiac Catalina



6.6L V8 Gas OHV with Resonator
Wagon

1 Per Vehicle
Pontiac Catalina

6.6L V8 Gas OHV
1
 
Wagon
 

Pontiac Catalina



6.6L V8 Gas OHV Wagon

1 Per Vehicle
Pontiac Catalina

6.6L V8 Gas OHV,
7.5L V8 Gas OHV
1
 
4BBL
 

Pontiac Catalina



6.6L V8 Gas OHV,
7.5L V8 Gas OHV 4BBL

1 Per Vehicle
Pontiac Catalina

7.5L V8 Gas OHV
1
 
Eng Ver: Pontiac
4BBL
Hardtop
 

Pontiac Catalina



7.5L V8 Gas OHV Eng Ver: Pontiac
4BBL
Hardtop

1 Per Vehicle
Pontiac Catalina

7.5L V8 Gas OHV
1
 
Eng Ver: Pontiac
4BBL
Sedan
 

Pontiac Catalina



7.5L V8 Gas OHV Eng Ver: Pontiac
4BBL
Sedan

1 Per Vehicle
Pontiac Catalina

6.6L V8 Gas OHV
1
 
with Pontiac Engine
4BBL
Hardtop
 

Pontiac Catalina



6.6L V8 Gas OHV with Pontiac Engine
4BBL
Hardtop

1 Per Vehicle
Pontiac Catalina

6.6L V8 Gas OHV
1
 
with Pontiac Engine
4BBL
Sedan
 

Pontiac Catalina



6.6L V8 Gas OHV with Pontiac Engine
4BBL
Sedan

1 Per Vehicle
Pontiac Grand Safari

6.6L V8 Gas OHV
1
 
8th VIN Digit: K
 

Pontiac Grand Safari



6.6L V8 Gas OHV 8th VIN Digit: K

1 Per Vehicle
Pontiac Grand Safari

6.6L V8 Gas OHV
1
 
8th VIN Digit: Z
 

Pontiac Grand Safari



6.6L V8 Gas OHV 8th VIN Digit: Z

1 Per Vehicle
Pontiac Grandville

7.5L V8 Gas OHV
1
 
 

Pontiac Grandville



7.5L V8 Gas OHV
1 Per Vehicle
Pontiac Grandville

6.6L V8 Gas OHV
1
 
4BBL
 

Pontiac Grandville



6.6L V8 Gas OHV 4BBL

1 Per Vehicle
Pontiac Grandville

7.5L V8 Gas OHV
1
 
4BBL
 

Pontiac Grandville



7.5L V8 Gas OHV 4BBL

1 Per Vehicle
Pontiac Parisienne

5.0L V8 Gas OHV
1
 
8th VIN Digit: Y
Wagon
 

Pontiac Parisienne



5.0L V8 Gas OHV 8th VIN Digit: Y
Wagon

1 Per Vehicle
Pontiac Parisienne

5.0L V8 Gas OHV
1
 
with 2.5 (in) Muffler Inlet
If welded assembly, replace all required parts
8th VIN Digit: H
Wagon
 

Pontiac Parisienne



5.0L V8 Gas OHV with 2.5 (in) Muffler Inlet
If welded assembly, replace all required parts
8th VIN Digit: H
Wagon

1 Per Vehicle
Pontiac Parisienne

5.0L V8 Gas OHV
1
 
with 2.5 (in) Muffler Inlet
If welded assembly, replace all required parts
Wagon
 

Pontiac Parisienne



5.0L V8 Gas OHV with 2.5 (in) Muffler Inlet
If welded assembly, replace all required parts
Wagon

1 Per Vehicle
Pontiac Safari

5.0L V8 Gas OHV
1
 
Wagon
 

Pontiac Safari



5.0L V8 Gas OHV Wagon

1 Per Vehicle