We all know mufflers, well…muffle, but less obvious are which mufflers provide the best blend of volume control and heart-pounding tone. Don’t sweat it. We compare Flowmaster’s most popular mufflers to help you find the series that’s best-suited for your ride.
Perfect for a daily driver, the Super 50 Series gives off a mellow tone at idle and is noticeably louder than your stock system when you stomp on the gas. It creates a nice deep hum – especially when you’re on it – but you can still talk in the car, even on the highway. The three-chamber design and large footprint allow this muffler to handle high-output engines without droning at speed. Your passengers might not think you modified the exhaust at all.
Looking for a performance growl without a scowl from your neighbors? Well, look no further than 50 Series Delta Flow. Think of it as a Super 50 with a bad attitude. Where the Delta differs from the Super is volume – Flowmaster Delta 50 mufflers have a similar three-chamber design to the Super 50, but with a thinner case and more baffles for added resonance, helping the Delta 50 create a little more noise that’s easier to activate.
Popular in the diesel community, the Flowmaster Pro Series muffler stands apart with its laminar flow design. Picture two mesh cones wrapped in ceramic material, touching tip to tip – that’s about all there is to it. No baffles to restrict flow, no fiberglass packing to blow out over time. That ceramic layer helps keep temperatures down, meaning this muffler can be mounted in tight spaces where heat is a concern. The Pro Series has what could be called a moderate sound. It’s stronger, deeper, and more present than a 50 Series.
Note: Droning is likely beyond this point in the Flowmaster lineup.
With its triple defector design, the Flowmaster 40 Series Delta Flow cranks out a more audible tone than the Pro Series. Essentially, Flowmaster took their original 40 Series muffler (which we’ll see in a moment) and tailored it more for everyday driving. It’s a design that’s a few decades old at this point, so people have had plenty of time to prove that the Delta 40 can enhance performance without getting too wild sound-wise.
Okay, things are starting to get loud around here. This Flowmaster exhaust sounds deeper and meaner than anything we’ve seen so far. The Flowmaster Super 40 Series sports a thicker case than a standard 40 or 44, meaning it can handle high outputs while keeping drone levels lower than the next models. This makes the Super 40 Series perfect for giving your street machine a muscular attitude without being overly loud.
The 40 Series is the muffler that put Flowmaster on the map. It’s the granddaddy of all the rest, and for decades it’s been the standard that all chambered mufflers are compared to. Whether you know it or not, you’ve heard a Flowmaster 40 more times than you could count. Depending on how modified your car is, the 40 may cause a lot of rumbling and drone inside the cabin – a small price to pay for that classic muscle car sound we all know and love.
It’s difficult to improve on a classic, but that’s what Flowmaster has done with the Super 44. A modern redesign of the 40 series, the 44 performs better thanks to its reworked internals. When considering the Flowmaster Super 44 vs 40, you’ll find a sound that could be described as modern rock to the 40’s old-school hair metal vibes. It’s the iconic Flowmaster sound with a new-school twist. And comparing the Flowmaster 40 vs 44, the Super 44 would generally perform better on a dyno. On the road, the only difference you’ll notice is the sound.
We know the saying isn’t, “loud things come in small packages,” but there’s no better way to describe the Flowmaster Super 10. It’s safely one of the loudest little metal boxes on the planet – at just 6” x 4”, this beast was born of the racing mufflers of old. We’re talking real racing here, not that light-to-light stuff. This is a place where every ounce of horsepower matters, where if the neighbors don’t like the sound, maybe they shouldn’t live so close to the race track.
We’ve reached the pinnacle. The Outlaw is the loudest Flowmaster exhaust currently available. It’s pretty much a straight pipe inside, so it’s only suitable for race applications – unless you’ve got the cajones to rock one on the road. Run a Flowmaster Outlaw on your tubbed-out supercharged Nova and deafen the crowd at the local dragstrip. Or the local mall, it’s up to you.
How do I choose the best Flowmaster muffler?
As we have now seen, Flowmaster offers mufflers for a wide variety of needs. It’s important to note that any existing modifications and your car’s overall condition can completely change the sound and either enhance or restrict the performance provided by the muffler. Check out forums, groups, and videos and ask around at car shows to find the one that’s best suited for your needs.
Just remember to be realistic when choosing a muffler. It’s easy to lose horsepower by bolting an expensive “racing” exhaust on a stock engine. Instead, choose a muffler that’s designed to make the most of what you have. The power gains will surprise you.
And, for more ideas on putting together your ride’s exhaust, take a look at our exhaust customer reviews.
Can I see a Flowmaster sound chart?