Walker 21727 Exhaust Resonator
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Walker

Walker 21727 Exhaust Resonator

Brand Walker 21727
Outlet Outside Diameter 2
Finish Aluminized
Inlet Type Pipe connection
Outlet Type Pipe connection
Inlet Inside Diameter 2
Body Width 8
Inlet Quantity 2
Body Material Stainless steel
Outlet Inside Diameter 2
Outlet Quantity 2
Resonator Shape Oval
Body 1 Height 3.5
Body 1 Length 18
Body 1 Shape Oval
Body 1 Width 8
Body Height 3.5
Body Length 18
Inlet Configuration Offset
Outlet Configuration Offset
Universal Or Specific Fit Direct fit
Fits Cadillac · 2 vehicles

Direct fit. Installs as a direct replacement with no modifications needed.

OE-style sound. Precise tuning helps deliver the original system's sound and flow.

Stainless steel body. Aluminized finish adds corrosion resistance for lasting performance.

Cross-references 20981157 and 25973276 for the same application. See all 2.

$121.59Free shipping
In stock · usually ships same day before 1pm CST
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Order total $121.59
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker 21727 Exhaust Resonator for Cadillac CTS

Walker 21727 is a direct-fit exhaust resonator built for 2008-2009 Cadillac CTS applications. It is designed to match original-system fit, flow, and sound characteristics while supporting a clean OE-style exhaust note.

  • Direct fit for 2008-2009 Cadillac CTS
  • Exhaust resonator with offset inlet and outlet configuration
  • 2-inch inlet and 2-inch outlet inside diameter
  • Oval body shape with 18-inch body length and 8-inch body width
  • Stainless steel body with aluminized finish
  • Pipe connection inlet and outlet type for exhaust system integration
  • Walker part number 21727 for replacement lookup and catalog matching

OE-Style Fit and Sound Control

Built for the Cadillac CTS exhaust system, Walker 21727 uses precise tuning to help maintain proper exhaust flow and the sound profile expected from the original setup. The oval resonator body and offset pipe connections support a direct replacement layout for 2008-2009 Cadillac CTS models. This part cross-references GM OE numbers 20981157 and 25973276 for the same application.

Common Replacement Uses

  • Restoring factory-style exhaust tone on a 2008-2009 Cadillac CTS
  • Replacing a worn, rusted, or damaged exhaust resonator
  • Addressing exhaust noise changes caused by internal resonator deterioration
  • Maintaining proper exhaust routing in a direct-fit Cadillac CTS exhaust repair
  • Matching OE-style dimensions during exhaust system service

Installation Notes

Fits 2008-2009 Cadillac CTS, N/A. If the vehicle uses a welded assembly, replace all required parts as noted in the fitment data. Verify inlet and outlet orientation, body dimensions, and pipe connection style before installation. Walker 21727 is intended for direct-fit replacement use on the listed Cadillac CTS applications.

Quality Assurance

Walker designs its resonators to fit, perform, and sound like the original system, using tuning methods aimed at consistent flow characteristics and OE-style exhaust sound.

Related reading

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2009CadillacCTS3.6LV6N/AIf welded assembly, replace all required parts
2008CadillacCTS3.6LV6N/AIf welded assembly, replace all required parts
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
2098115725973276