Flowmaster 40 Series Chambered Muffler: Dodge Challenger (70-74) / Charger (66-74)

Flowmaster 40 Series Chambered Muffler

1966–1974 Dodge Charger / 1970–1974 Dodge Challenger

42441

Overview:

The Flowmaster 40 Series Chambered Muffler is a classic exhaust upgrade designed specifically for vintage muscle cars like the Dodge Charger (1966–1974) and Dodge Challenger (1970–1974). Renowned for delivering the iconic Flowmaster sound, this muffler offers an aggressive tone that enhances both the exterior and interior exhaust note. It is ideal for enthusiasts seeking to retain the authentic muscle car exhaust character while improving overall exhaust flow and durability.

Whether you’re restoring a classic or upgrading your muscle car’s exhaust system, the 40 Series muffler provides a perfect balance of performance and sound quality. Its chambered design ensures a deep, throaty rumble without excessive drone, making it suitable for street and weekend driving.

Key Features:

The Flowmaster 40 Series Chambered Muffler combines proven technology with durable construction to meet the demands of muscle car enthusiasts. Key features include:

• Classic 40 Series chambered design for the signature aggressive Flowmaster sound
• Offset inlet (2.25") and center outlet (2.25") configuration for versatile installation
• Constructed from 16 gauge aluminized steel for corrosion resistance and longevity
• Fully MIG welded seams for enhanced structural integrity
• Designed to improve exhaust flow while maintaining a deep, aggressive tone
• Direct fitment for Dodge Charger (1966–1974) and Dodge Challenger (1970–1974) models
• Compatible with a variety of V8 engine setups commonly found in these classic muscle cars
• Provides a balanced sound profile that reduces excessive drone on the highway

Construction & Design:

The Flowmaster 40 Series muffler is engineered with durability and performance in mind. Its 16 gauge aluminized steel shell offers excellent resistance to rust and corrosion, ensuring long-lasting service life even under harsh driving conditions. The muffler’s chambers are precisely designed to create the distinctive Flowmaster exhaust note, combining sound attenuation with an aggressive tone.

Fully MIG welded construction enhances the muffler’s strength and prevents leaks, providing a reliable seal throughout its lifespan. The offset inlet and center outlet design allow for flexible installation options, making it a practical choice for classic Dodge muscle cars with varying exhaust layouts.

Performance & Sound

The 40 Series muffler is celebrated for its aggressive yet refined exhaust tone. It produces a deep, throaty rumble that is unmistakably Flowmaster, delivering an authentic muscle car sound without overwhelming cabin drone. This muffler enhances exhaust flow, which can contribute to improved throttle response and a more engaging driving experience.

Ideal for drivers who want to maintain the classic muscle car character while upgrading their exhaust system, the 40 Series balances performance gains with a powerful, aggressive sound signature.

Installation & Fitment:

This muffler is designed for direct fitment on Dodge Charger models from 1966 through 1974 and Dodge Challenger models from 1970 through 1974. Installation typically requires no major modifications, fitting seamlessly into existing exhaust systems with 2.25-inch inlet and outlet pipes. Professional installation is recommended to ensure proper alignment and secure mounting.

The offset inlet and center outlet configuration provide flexibility for various exhaust layouts, making it a straightforward upgrade for classic muscle car restorations or performance enhancements.

What's Included:

• Flowmaster 40 Series Chambered Muffler (Part #42441)
• Installation hardware not included (recommended to use OEM or aftermarket clamps and hangers)

Ideal For:

This muffler is perfect for classic muscle car enthusiasts, restorers, and performance-minded drivers who own Dodge Charger (1966–1974) or Dodge Challenger (1970–1974) models. It suits those looking to enhance their vehicle’s exhaust sound and performance while preserving the authentic Flowmaster tone that has defined muscle car culture for decades.