Walker
Quiet-Flow SS

Walker 21670 Exhaust Muffler

Brand Walker 21670
Muffler Type Reflection
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Body Width 11
Inlet Quantity 1
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 26.125
Body Height 5.5
Body Length 15
Body Material Stainless steel
Finish Aluminized
Inlet 1 Type 2 bolt welded flange
Inlet Configuration Offset
Inlet Offset 3.75
Inlet Type 2 bolt welded flange
Outlet 1 Outside Diameter 2.25
Outlet 1 Type Tip
Outlet Configuration Center
Outlet Outside Diameter 2.25
Outlet Type Tip
Product line Quiet-Flow SS
Fits Mitsubishi · 7 vehicles

Stainless-steel construction. Helps resist corrosion in demanding exhaust environments.

OE-style sound. Balances exhaust flow with a factory-like tone.

Specific-fit design. Built for a precise replacement on select exhaust applications.

Cross-references MN153177 for the same application. See all 1.

$170.19Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $170.19
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Overview

Walker Quiet-Flow SS 21670 is a specific-fit exhaust muffler built for select Mitsubishi Eclipse applications. It combines stainless-steel construction with an OE-style sound profile and precision fitment for a direct replacement approach.

Key Features

  • 100% stainless-steel body for corrosion resistance
  • Reflection muffler design for controlled exhaust flow
  • Oval body shape with offset inlet and center outlet configuration
  • 2-bolt welded flange inlet for secure exhaust connection
  • Quiet-Flow SS product line focused on OE-style sound and fit

Detailed Description

This Walker exhaust muffler is engineered for Mitsubishi Eclipse models from 2006-2012, with fitment varying by application notes. The 21670 uses a stainless-steel body, aluminized finish, and a reflection-style internal design to balance flow and sound control. Its specific-fit construction supports a clean replacement for the original muffler while maintaining the vehicle’s factory-style exhaust character. This part cross-references Monroe Shocks & Struts (e.g., MN153177) for the same application.

Quiet-Flow SS is Walker’s stainless-steel muffler line for drivers who want a durable exhaust replacement with OE-style acoustics. The line is built around precision fit and broad-market coverage for domestic and import vehicles, making it a practical choice when replacing a worn muffler on a Mitsubishi Eclipse.

What It Helps Address

  • Exhaust noise that has become louder or harsher
  • Rust or corrosion in the muffler body
  • Poor exhaust flow caused by an aging muffler
  • Fitment issues from a damaged or incorrect replacement part

Installation Notes

Verify the inlet and outlet configuration, flange style, and overall dimensions before installation. This muffler uses a specific-fit design, so matching the vehicle application and exhaust layout is important for proper alignment. Confirm the Mitsubishi Eclipse year range and notes in the fitment data before ordering.

Quality Assurance

Walker Quiet-Flow SS mufflers are part of a stainless-steel product line focused on precision fit and OE-style sound. The manufacturer describes this muffler family as available for most domestic and import vehicles.

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2012MitsubishiEclipse2.4LL4Premium; with Single Exhaust; Limited Lifetime Warranty; Quiet-Flow SS
2011MitsubishiEclipse2.4LL4Premium; with Single Exhaust; Limited Lifetime Warranty; Quiet-Flow SS
2010MitsubishiEclipse2.4LL4Premium; with Single Exhaust; Limited Lifetime Warranty; Quiet-Flow SS
2009MitsubishiEclipse2.4LL4Premium; Limited Lifetime Warranty; Quiet-Flow SS
2008MitsubishiEclipse2.4LL4Premium; Limited Lifetime Warranty; Quiet-Flow SS
2007MitsubishiEclipse2.4LL4Premium; Limited Lifetime Warranty; Quiet-Flow SS
2006MitsubishiEclipse2.4LL4Premium; Limited Lifetime Warranty; Quiet-Flow SS
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
MN153177