Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler brings proven Delta Flow® technology to your street or strip build, delivering the aggressive exhaust note enthusiasts crave without sacrificing durability. Built around a two-chamber design, this muffler uses Flowmaster’s engineered Delta deflectors to generate increased scavenging for better performance while smoothing out the interior sound your ears actually live with day to day.
Compared to the standard 40 Series, this Delta Flow version offers a milder exterior tone and reduced interior resonance, making it an excellent choice when you want serious presence outside the vehicle and a more livable cabin experience on the highway. It’s a purpose-built performance muffler for drivers who take their exhaust seriously.
Built to Last
Construction is where the 40 Series Delta Flow earns its reputation. Each muffler is fabricated from 16-gauge aluminized steel and fully MIG welded for maximum durability, standing up to heat, vibration, and the demands of aggressive street and strip use. A high-temperature paint finish helps the housing resist the elements and the thermal stress that comes with hard driving.
Key Benefits
- Delta Flow® two-chamber design with Delta deflectors for increased scavenging and better performance
- Aggressive sound level with a milder exterior tone than the standard 40 Series
- Reduced interior resonance for a more comfortable cabin
- 16-gauge aluminized steel construction, fully MIG welded for maximum durability
- High-temperature paint finish built to handle exhaust heat
- Universal fitment with a 2.00-inch inlet diameter
Fitment & Installation
This is a universal-fit muffler with a 2.00-inch inlet diameter, giving fabricators and DIY installers flexibility to integrate it into a wide range of exhaust systems. It carries an Emission Code of 5 and is engineered for street/strip vehicle use. Note that the muffler uses new hangers, which are not included, and any exhaust tip is sold separately, so plan your build accordingly to complete the installation cleanly.
Why the 40 Series Delta Flow
If you want the unmistakable Flowmaster growl with a refined edge, the 40 Series Delta Flow strikes a smart balance. The chambered design and Delta deflector technology work together to boost exhaust scavenging while taming the drone that can make aggressive setups tiring on long drives. The result is a muffler that sounds strong when you get on the throttle and stays composed when you’re just cruising. Backed by rugged aluminized steel construction and full MIG welds, it’s a dependable upgrade for enthusiasts building a performance exhaust that looks, sounds, and holds up the way it should.
