The Flowmaster 40 Series Muffler is the original high-performance exhaust upgrade that revolutionized the muscle car sound. Known for its aggressive tone and deep, throaty rumble, this street and strip …

The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it.

Then take a look at their 40 Series mufflers. Designed for use on street and strip vehicles, they take the sound waves produced in the exhaust, and cancel them against angled baffles built into the muffler …

Flowmaster Universal 40 Series Muffler Set (2 Pack) – Offset In/Out 2.5 Inch Muffler – Durable, Black Aluminized Steel for Exhaust Tone – Aggressive Sound Mufflers for Trucks, Muscle Cars & More

Find the right Flowmaster 40 Series Exhaust Muffler for your vehicle at O'Reilly Auto Parts. Place your order online and pick it up at your local store for free.

Flowmaster's 40 Series Original Mufflers are designed for street/strip and off-road use. These aggressive sounding mufflers deliver a powerful, classic "Flowmaster Sound" from both inside and …

Flowmaster 40 Series Original Mufflers are the most recognizable mufflers in the American V8 industry, delivering a classic muscle tone. The 40 series comes in a variety of configurations, pipe sizes and …

The original Flowmaster 40 series muffler delivers an aggressive exterior and interior tone. If you are looking for that original “Flowmaster sound” this is the muffler is for you.

Overview The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge …

The Flowmaster 40 Series Chambered Muffler is a classic choice for enthusiasts seeking the iconic Flowmaster sound combined with durable construction. Designed specifically for the 1997–2010 …