Description
Overview
The Flowmaster 40 Series Chambered Muffler is the muffler that defined the legendary Flowmaster sound. As part of the Original 40 Series, this flowmaster muffler is engineered to deliver an aggressive exterior and interior tone that instantly identifies your build as serious performance. If you’ve been chasing that unmistakable flowmaster exhaust rumble, the flowmaster 40 is the exhaust muffler that started it all.
Built to endure the demands of a high-output street or muscle car, this performance muffler is constructed from 16 gauge 409S stainless steel and fully MIG welded for maximum durability. The chambered design generates the deep, throaty character that made the flowmaster company a household name among enthusiasts building classic muscle car exhaust systems.
Key Benefits
Whether you’re piecing together a complete flowmaster exhaust system or upgrading the stock car muffler on a classic, the 40 Series brings proven acoustics and rugged construction together. Its 2.50-inch inlet diameter and 9.50-inch body width make it a versatile choice for a wide range of builds, and its universal fitment means it can be integrated into custom and factory-style setups alike.
- Original 40 Series chambered design for that authentic, aggressive flowmaster sound
- 16 gauge 409S stainless steel body, fully MIG welded for long-term durability
- 2.50-inch inlet diameter and 9.50-inch body width
- High-temperature paint finish to resist heat and the elements
- Universal fitment ideal for classic muscle car applications
- Aggressive interior and exterior tone that stands out
Sound & Performance
Among performance mufflers, the flowmaster 40 series is prized for its bold, aggressive sound level. This is not a quiet exhaust muffler for the car that blends in — it’s designed to announce itself. The chambered internals deliver the raw, race-inspired note enthusiasts associate with the flowmaster name, both inside the cabin and out on the street.
Fitment & Installation Notes
This flowmaster exhaust muffler features a universal fit and uses new hangers, which are not included, so plan your installation hardware accordingly. Exhaust tips are sold separately, letting you finish the system to match your vehicle’s style. The muffler is best suited to classic muscle car builds where the signature Flowmaster tone completes the package.
Please note this product carries a California Proposition 65 warning and falls under emission code 5. When you want mufflers that pair legendary acoustics with durable, MIG-welded stainless construction, the Flowmaster 40 Series delivers the original performance muffler experience that continues to set the standard for flowmaster exhaust systems.
