HomeExhaust > MufflersWalker 21856 Exhaust Muffler
Part #: 21856

Walker 21856 Exhaust Muffler

Quiet-Flow
14 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Quiet-Flow
Fitment: Cadillac, DeVille, Eldorado, and Fleetwood
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Quiet-Flow Exhaust Muffler 21856

The Walker Quiet-Flow Exhaust Muffler 21856 is designed specifically for Cadillac DeVille, Eldorado, and Fleetwood models. This oval-shaped muffler offers a precise fit and reliable performance for your vehicle's exhaust system.

  • Specific fit for Cadillac DeVille, Eldorado, and Fleetwood
  • Oval body shape with aluminized steel construction
  • 2.5-inch inlet and outlet pipe connections
  • Offset inlet configuration with center outlet
  • Overall length of 23 inches and body length of 19 inches

Product Features and Specifications

This exhaust muffler features a regular grade aluminized steel body that provides corrosion resistance and durability. The oval shape measures 9.75 inches in width and 4.25 inches in height, ensuring a compact yet effective design. The inlet and outlet both have a 2.5-inch inside diameter with pipe connection types, facilitating straightforward integration into the exhaust system. The inlet is offset by 2.875 inches, while the outlet is centered, supporting proper exhaust flow and fitment. This muffler is a combination type, designed for specific applications rather than universal use, and is not reversible or tunable.

Walker Quiet-Flow Product Line Details

The Quiet-Flow line by Walker focuses on providing mufflers engineered for noise reduction and efficient exhaust flow. This product line emphasizes precise fitment and quality materials, making it suitable for vehicles like the Cadillac DeVille, Eldorado, and Fleetwood. The 21856 muffler maintains these standards by combining durable aluminized steel construction with a design tailored to specific vehicle requirements.

Applications and Problem Solving

  • Replaces worn or damaged mufflers on Cadillac DeVille, Eldorado, and Fleetwood
  • Reduces exhaust noise for a quieter driving experience
  • Restores proper exhaust flow to maintain engine performance
  • Prevents exhaust leaks caused by rust or corrosion
  • Ensures compliance with vehicle-specific exhaust system requirements

Installation Notes and Tips

Installation requires matching the 2.5-inch inlet and outlet pipe connections to the vehicle’s exhaust system. The offset inlet and center outlet configuration should be aligned carefully to ensure proper fitment. This muffler is designed for specific Cadillac models, so verify compatibility before installation. Professional installation is recommended to maintain exhaust system integrity and performance.

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow 21856 muffler with aluminized steel for corrosion resistance and durability. While specific warranty details are not provided, Walker products typically meet industry standards for quality and reliability. Using this muffler helps maintain the exhaust system’s function and longevity on Cadillac DeVille, Eldorado, and Fleetwood vehicles.

BrandWalker
Part Number21856
PositionQuiet-Flow
Universal Or Specific FitSpecific
ShapeOval
Grade TypeRegular
Inlet Inside Diameter2.5
Body Width9.75
Inlet Quantity1
Outlet Inside Diameter2.5
Outlet Quantity1
ReversibleNo
TunableNo
Overall Length23
Body Height4.25
Body Length19
Body MaterialSteel
FinishAluminized
Inlet 1 Inside Diameter2.5
Inlet 1 TypePipe connection
Inlet ConfigurationOffset
Inlet Offset2.875
Inlet TypePipe connection
Muffler TypeCombination
Outlet 1 Inside Diameter2.5
Outlet 1 TypePipe connection
Outlet ConfigurationCenter
Outlet TypePipe connection

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1978CadillacEldorado7.0LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1977CadillacEldorado7.0LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1976CadillacDeVille8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1976CadillacEldorado8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1976CadillacFleetwood8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1975CadillacDeVille8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1975CadillacEldorado8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1975CadillacFleetwood8.2LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1970CadillacDeVille7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1970CadillacFleetwood7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1969CadillacDeVille7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1969CadillacFleetwood7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1968CadillacDeVille7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow
1968CadillacFleetwood7.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow

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

This part directly replaces or is cross-referenced with the following part numbers:

16834CB

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