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Flowmaster 425404 Series Chambered Muffler Aggressive Sound - 40

Part of: Flowmaster Series Chambered Muffler Aggressive Sound

Other options in this family: Flowmaster 42441 Flowmaster 430402 Flowmaster 42541 Flowmaster 43043 Flowmaster 42543

Manufacturer

Picture for manufacturer Flowmaster

Part Number

425404
8 reviews
Sale Price

$101.95

1 left at this price

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Usually delivered within 2 days

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Product Details

The Flowmaster 40 Series Chambered Muffler delivers an aggressive exhaust tone that's perfect for enthusiasts who want their vehicle to be heard. This popular muffler features Flowmaster's original two-chamber design, engineered to produce a deep, powerful sound while still maintaining moderate interior comfort levels.

Key Features:

  • Original 40 Series two-chamber design for aggressive exhaust note
  • No internal packing materials that can deteriorate or blow out over time
  • Constructed from fully welded 16-gauge aluminized steel for maximum durability
  • Ideal for street/strip performance and off-road applications
  • Chambered design creates moderate interior sound with aggressive exterior tone
  • Lifetime limited warranty from Flowmaster

The 40 Series has been a Flowmaster staple for decades, offering a louder, more aggressive sound than the 50 Series while remaining civilized enough for daily driving. The chambered technology uses precisely tuned passages to cancel out unwanted frequencies while allowing the deep, throaty exhaust note to flow through. With no fiberglass packing to degrade, this muffler maintains consistent performance and sound throughout its service life.

Products specifications

Body Height

4.00

Body Length

13.00

Body Material

Aluminized steel

Body Width

9.50

Brand

Flowmaster

Prop 65

No

Category

Exhaust

Clamps Included

No

Color

Black

Emission Code

5

Exhaust Tip Quantity

0

Exhaust Tip Quantity

Sold Separately

Finish

High-Temperature Paint

Fitment

Universal

Grade Type

Performance

Hanger Included

No

Heat Shield Attached

No

Inlet Connection

Slip-Fit

Inlet Diameter

2.50

Inlet Inside Diameter

2.50

Inlet Location

Dual

Inlet Outside Diameter

2.63

Inlet Quantity

2

Inlet Type

Weld-On

Inlet Type

Clamp-On

Muffler Series

Original 40 Series

Muffler Type

Chambered

Outlet Connection

Slip-Fit

Outlet Location

Dual

Outlet Outside Diameter

2.63

Outlet Quantity

2

Outlet Type

Dual

Overall Length

19.00

Part Type

Exhaust Muffler

Product Type

Street Mufflers

Reversible

No

Shape

Oval

Sound Level

Aggressive

Sub Category

Mufflers

Tunable

No

Universal Or Specific Fit

Universal

Vehicle Type

Classic Muscle Car

Vehicle Type

Street/Strip

Vehicle Type

Truck/SUV

Vehicle Type

Late Model Muscle Car

Vehicle Type

Street Rod

fast shipping, product received was product described.

so far so good.

good website...

had an obscure part for my old truck. quick affordable shipping, fair prices, Great!

Found item quick and the order was simple

good

My part came very fast, it took only two days to arrive. I feel I got a great deal on the part I bought, and I am very happy with the quality and the service. I will definitely do business again. Thank you.

Order was quickly processed, good price too.

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