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Walker Quiet-Flow SS 21640 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.25" Outlet (ID) for Jeep Grand Cherokee

4.0 out of 5 stars 74 ratings
$87.78
FREE Returns
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Purchase options and add-ons

Brand Walker
Item dimensions L x W x H 35 x 10.75 x 5.5 inches
Vehicle Service Type Car
Shape Oval
Inlet Connection Size 3 Inches
Material
Stainless Steel
Item Weight
5 Pounds

About this item

  • COMPATIBILITY – Fits 2002-2002 Jeep Grand Cherokee; 2003-2003 Jeep Grand Cherokee; 2004-2004 Jeep Grand Cherokee
  • GET THE RIGHT PART -- Before purchasing, research to ensure that the part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes
  • STAINLESS STEEL INHIBITS CORROSION -- 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
  • 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
  • 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
  • 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
  • DESIGN VALIDATED -- Acoustic and flow tested for quality OE-style sound you can count on
  • BUY WITH CONFIDENCE -- Comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.
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Walker Quiet-Flow SS 21640 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.25" Outlet (ID) for Jeep Grand Cherokee
This item: Walker Quiet-Flow SS 21640 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.25" Outlet (ID) for Jeep Grand Cherokee
$87.78
Get it as soon as Tuesday, May 13
Only 19 left in stock - order soon.
Ships from and sold by Amazon.com.
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Walker 55593 Exhaust Tail Pipe 2.25" Inlet (OD) for Jeep Grand Cherokee
$66.98
Get it as soon as Wednesday, May 14
Only 13 left in stock (more on the way).
Ships from and sold by Amazon.com.
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Walker 35337 Exhaust Clamp for Ford F-150
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From the manufacturer

Hero
Walker Quiet Flow Module2

WALKER QUIET-FLOW SS MUFFLERS

Combining industry-leading coverage with a direct fit OE-style replacement design, Walker Quiet-Flow SS mufflers and muffler assemblies deliver a precision fit, superior flow and OE-style sound. Walker Quiet-Flow SS mufflers are the only broad market muffler to feature 100% stainless-steel heads, shell, bushings, louvered tubes and partitions.

Module3-01

EASY TO INSTALL

Direct-fit bolt-on replacement includes OE-style hangers, brackets and pipe routings for easy installation and doesn’t require specialized fabrication and/or welding

Module3-02

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

Module3-03

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

Module3-04

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 structural stability and longer service life

Module-04

WHAT IS AN EXHAUST SYSTEM?

Vital for fuel economy and the environment, your vehicle’s exhaust system carries away harmful gases that are created during the combustion process. The exhaust system not only keeps dangerous gases like carbon monoxide, nitrogen oxides and hydrocarbons from entering the cabin but it also "cleans up" the gases before they are released into the environment. Here are the components of an exhaust system:

  1. Manifold/Manifold Converters
  2. Oxygen (O2) Sensor Ports
  3. Catalytic Converters
  4. Resonator Assemblies
  5. Mufflers/Muffler Assemblies

Module5-01

SIGNS OF MUFFLER WEAR

Mufflers primarily deteriorate from the inside out due to the acidic moisture produced by the combustion process. Other signs you may need to replace your muffler include noise coming from the muffler, a foul odor from not properly filtering exhaust gases or a distorted body shell.

Module5-02

HOW TO TORQUE FLANGES

Progressively tighten bolts on flanges to avoid exhaust system leaks, gasket & stud failure and premature system fatigue & failure. For example, if the nuts require 60-ft-lbs of torque, start by torquing all nuts to 20-ft-lbs, then 40-ft-lbs and finish at 60-ft-lbs. For Y-pipes secure both sides simultaneously, tightening in a rotating sequence between both pipes. For manifold converters, begin sequence in the middle & work evenly out between both sides.

Module5-03

CHOOSING THE RIGHT CLAMP

Manufactured from premium steel, these clamps are available in multiple varieties of saddle, band and wire ring clamps. Selecting the correct clamp style is critical for achieving desired levels of sealability, durability and serviceability. May require separate purchase.

Module5-04

WHY MUFFLER QUALITY MATTERS?

A muffler’s cross section is key to its performance. Walker Quiet-Flow SS mufflers feature OE-style cross sections to deliver the same quiet, factory sound experienced when the vehicle was new. Walker’s approach helps prevent degraded cabin acoustics, including exhaust drone.

Product Description

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.

Product information

Technical Details

Brand ‎Walker
Item dimensions L x W x H ‎35 x 10.75 x 5.5 inches
Vehicle Service Type ‎Car
Shape ‎Oval
Inlet Connection Size ‎3 Inches
UPC ‎086387216401
Manufacturer ‎Tenneco (Dynomax, Walker, Thrush)
Global Trade Identification Number ‎00086387216401
Item Weight ‎5 pounds
Product Dimensions ‎35 x 10.75 x 5.5 inches
Country of Origin ‎USA
Item model number ‎21640
Manufacturer Part Number ‎21640

Additional Information

ASIN B00AYXNC5S
Customer Reviews
4.0 out of 5 stars 74 ratings

4.0 out of 5 stars
Best Sellers Rank #550,485 in Automotive (See Top 100 in Automotive)
#652 in Automotive Replacement Exhaust Mufflers
Date First Available January 9, 2013

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ] Product Warranty: For warranty information about this product, please click here. [PDF 99 KB]

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Walker Quiet-Flow SS 21640 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.25" Outlet (ID) for Jeep Grand Cherokee
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Price$87.78$498.73$64.78$120.62$54.43-8% $89.95
Typical: $97.67
Delivery
Get it as soon as Tuesday, May 13
Get it as soon as Tuesday, May 13
Get it as soon as Tuesday, May 13
Get it as soon as Tuesday, May 13
Get it as soon as Tuesday, May 13
Get it as soon as Tuesday, May 13
Customer Ratings
4.04.0 out of 5 stars74
5.05.0 out of 5 stars2
4.14.1 out of 5 stars33
3.93.9 out of 5 stars7
4.54.5 out of 5 stars609
4.24.2 out of 5 stars178
Sold By
compatible vehicles
inlet size
material
weight

Customer reviews

4 out of 5 stars
74 global ratings

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Customers say

Customers find the muffler sounds great, fits perfectly, and matches OEM quality. They appreciate its ease of installation. However, several customers report issues with rust developing within a year of use.

AI-generated from the text of customer reviews

Select to learn more

8 customers mention "Sound quality"8 positive0 negative

Customers like the muffler's sound quality, describing it as great and quiet.

"...fits my 03 Grand Cherokee 4.0L. It's as good as OEM if not better, sounds OEM. You'll need a couple of 2.5" exhaust pipe clamps...." Read more

"Factory fit, sound is as original. Would recommend it." Read more

"It's quiet, good quality, would but again." Read more

"...Overall its a good muffler." Read more

7 customers mention "Fit"7 positive0 negative

Customers are satisfied with how the muffler fits.

"Factory fit, sound is as original. Would recommend it." Read more

"It was perfect fit love the stainless. Was exact fit." Read more

"Perfect fit for my Jeep Grand Cherokee" Read more

"Perfect fit." Read more

7 customers mention "Quality"7 positive0 negative

Customers find the muffler to be high quality, with some noting it performs as well as OEM parts.

"Great muffler, perfectly fits my 03 Grand Cherokee 4.0L. It's as good as OEM if not better, sounds OEM...." Read more

"It's quiet, good quality, would but again." Read more

"This muffler was easy to install and high quality. Excellent value." Read more

"Seems good as OEM" Read more

4 customers mention "Ease of installation"4 positive0 negative

Customers find the muffler easy to install.

"Very easy installation with a sawzall and hand tools...." Read more

"This muffler was easy to install and high quality. Excellent value." Read more

"arrived quickly, installed easily and sounds great...bought with Walker tail pipe which corroded causing system to fail and have to be replaced in..." Read more

"Easy to install and quiet." Read more

3 customers mention "Rust resistance"0 positive3 negative

Customers report issues with the muffler's durability, noting that it rusted within a year of use.

"...Long story short it rusted in little over a year...." Read more

"I installed this in August and it’s already rusting before we’ve had any snow (salt on the roads) now it sounds like something broke off inside the..." Read more

"...and sounds great...bought with Walker tail pipe which corroded causing system to fail and have to be replaced in three years at great expense." Read more

Good quality muffler
5 out of 5 stars
Good quality muffler
Very easy installation with a sawzall and hand tools. For both of my daughter's Grand Cherokee 4.0 Ls (2002 and 2003) I used a Nickson Industries 2-1/4"ID x 2-1/4"OD Adapter PN (17512) from my local O'Reillys. It was installed at the muffler outlet and that made up the few inches that I lost where the converter outlet to muffler inlet pipe rotted away. Remember to get an additional clamp if you go this route.
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Top reviews from the United States

  • Sorlo
    5.0 out of 5 stars Great muffler, fits 03 WJ 4.0L
    Reviewed in the United States on February 22, 2020
    Verified Purchase
    Great muffler, perfectly fits my 03 Grand Cherokee 4.0L. It's as good as OEM if not better, sounds OEM. You'll need a couple of 2.5" exhaust pipe clamps. I double clamped the inlet side, just to be safe.
    Helpful
     Report
  • TDM
    5.0 out of 5 stars Works perfectly
    Reviewed in the United States on July 17, 2021
    Verified Purchase
    Factory fit, sound is as original. Would recommend it.
    Helpful
     Report
  • Abel C
    4.0 out of 5 stars Quality
    Reviewed in the United States on August 17, 2017
    Verified Purchase
    It's quiet, good quality, would but again.
    One person found this helpful
    Helpful
     Report
  • Bard
    1.0 out of 5 stars definitely not quiet
    Reviewed in the United States on May 7, 2025
    Verified Purchase
    purchased to replace noisy walker sound fx. The inlet size is larger than advertised resulting in pipe change also. When completed and running, the sound is exactly the same. Drone. A waste of time and money
    Helpful
     Report
  • S. Patrick Kelley
    5.0 out of 5 stars Good quality muffler
    Reviewed in the United States on October 18, 2019
    Verified Purchase
    Very easy installation with a sawzall and hand tools. For both of my daughter's Grand Cherokee 4.0 Ls (2002 and 2003) I used a Nickson Industries 2-1/4"ID x 2-1/4"OD Adapter PN (17512) from my local O'Reillys. It was installed at the muffler outlet and that made up the few inches that I lost where the converter outlet to muffler inlet pipe rotted away. Remember to get an additional clamp if you go this route.
    Customer image
    S. Patrick Kelley
    5.0 out of 5 stars
    Good quality muffler

    Reviewed in the United States on October 18, 2019
    Very easy installation with a sawzall and hand tools. For both of my daughter's Grand Cherokee 4.0 Ls (2002 and 2003) I used a Nickson Industries 2-1/4"ID x 2-1/4"OD Adapter PN (17512) from my local O'Reillys. It was installed at the muffler outlet and that made up the few inches that I lost where the converter outlet to muffler inlet pipe rotted away. Remember to get an additional clamp if you go this route.
    Images in this review
    Customer image
    3 people found this helpful
    Helpful
     Report
  • Timothy Evans
    3.0 out of 5 stars Less noise
    Reviewed in the United States on June 13, 2023
    Verified Purchase
    Fit well slightly to long
    Helpful
     Report
  • gks
    5.0 out of 5 stars The right choice
    Reviewed in the United States on May 25, 2016
    Verified Purchase
    I had three simple criteria:
    1. I wanted my Jeep to sound as close to an electric car, as I can make it.
    2. I don't want to have to revisit this in two or three years... again.
    3. I didn't want it to cost as much as the crappy "premium" mufflers they've been selling me at the muffler shops.
    I really think I made the right choice!
    2 people found this helpful
    Helpful
     Report
  • Dan
    5.0 out of 5 stars High quality and excellent value
    Reviewed in the United States on December 14, 2019
    Verified Purchase
    This muffler was easy to install and high quality. Excellent value.
    Helpful
     Report

Top reviews from other countries

  • Joe Vaskor
    5.0 out of 5 stars perfect fit.
    Reviewed in Canada on April 27, 2020
    Verified Purchase
    Perfect fit just like original.Good product.
    Report
  • Amazon Customer
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on June 2, 2017
    Verified Purchase
    Excellent and fast!!!!!!!
    Report
  • Jean-Luc
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on June 9, 2016
    Verified Purchase
    good price, fast shipping
    Report

Product Summary: Walker Quiet-Flow SS 21640 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.25" Outlet (ID) for Jeep Grand Cherokee

From Walker

4.0 out of 5 stars, 74 ratings

Customer reviews

50+ viewed in past month

Price

One-time purchase: $87.78

Purchasing options

Other sellers

Other sellers

About this Item

  • COMPATIBILITY – Fits 2002-2002 Jeep Grand Cherokee; 2003-2003 Jeep Grand Cherokee; 2004-2004 Jeep Grand Cherokee
  • GET THE RIGHT PART -- Before purchasing, research to ensure that the part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes
  • STAINLESS STEEL INHIBITS CORROSION -- 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
  • 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
  • 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
  • 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
  • DESIGN VALIDATED -- Acoustic and flow tested for quality OE-style sound you can count on
  • BUY WITH CONFIDENCE -- Comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.

Product Description

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.

Important Information

Proposition 65 Warning for California Consumers

WARNING: This product can expose you to chemicals including 1,1,1,2-Tetrachloroethane which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov

Proposition 65 Warning for California Consumers

WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle

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