Street Flow 2-Chamber Performance Muffler | 3" Center In / 3" Center Out

Similar to the Flowmaster 40 series

Street Flow SF43040 2-Chamber Performance Muffler. Engineered for enthusiasts who want a deep, aggressive muscle car tone with improved exhaust performance, the SF43040 delivers excellent flow characteristics while maintaining the signature chambered sound that has made this style of muffler a favorite for decades.

Built from heavy-duty 16-gauge aluminized steel, the SF43040 is designed for long-lasting durability and features precision-crafted internal chambers that improve exhaust scavenging and deliver a powerful, aggressive exhaust note. A premium high-heat silver powder coat finish helps resist corrosion while maintaining a clean appearance, and the installer-friendly design makes fabrication simple for custom exhaust projects.

The 3" Center In / 3" Center Out configuration is ideal for muscle cars, performance trucks, hot rods, Jeeps, LS engine swaps, and custom exhaust systems requiring a centered inlet and outlet. Whether you're replacing an existing chambered muffler or building a new exhaust from scratch, the SF43040 provides the classic performance sound enthusiasts are looking for.

Features

✔ Classic 2-chamber performance design

✔ Deep, aggressive muscle car exhaust tone

✔ Heavy-duty 16-gauge aluminized steel construction

✔ Premium high-heat silver powder coat finish

✔ Precision handcrafted internal chambers

✔ Improved exhaust flow characteristics

✔ Installer-friendly design

✔ North American made

Specifications

• Part Number: SF43040
• Series: Street Flow
• Muffler Style: 2-Chamber
• Inlet: 3" Center
• Outlet: 3" Center
• Body Size: 4" x 9.5" Oval
• Body Length: 13"
• Overall Length: 19"
• Material: 16-Gauge Aluminized Steel
• Finish: High-Heat Silver Powder Coat
• Sound Level: Moderate to Aggressive
• Configuration: Non-Reversible
• Universal Fitment
• Warranty: 3-Year Limited Warranty

Ideal For

• Muscle cars
• Performance trucks
• Street rods
• LS engine swaps
• Classic restorations
• Custom exhaust systems
• V8 performance applications
• Off-road builds