Street Flow 2-Chamber Performance Muffler | 2.5" Center In / 2.5" Offset Out |

Similar to the Flowmaster 40 series 

Street Flow SF42542 2-Chamber Performance Muffler. Designed for enthusiasts who want a deep, aggressive muscle car tone while improving exhaust flow, the SF42542 is an excellent choice for street performance, trucks, hot rods, Jeeps, and custom exhaust systems.

Constructed from heavy-duty 16-gauge aluminized steel, the SF42542 features precision-crafted internal chambers that enhance exhaust scavenging while delivering a bold, aggressive exhaust note. The premium high-heat exterior finish provides excellent corrosion resistance and long-lasting durability, while the compact oval design makes installation easy in a wide variety of vehicles. Its non-reversible chambered construction is tuned to provide a moderate-to-aggressive exhaust sound with improved flow characteristics.

The 2.5" Center In / 2.5" Offset Out configuration is one of the most popular layouts for muscle cars, classic restorations, performance trucks, and custom V8 exhaust systems requiring a centered inlet with an offset outlet.

Features

✔ Classic 2-chamber performance design

✔ Deep, aggressive muscle car exhaust tone

✔ Heavy-duty 16-gauge aluminized steel construction

✔ Premium high-heat exterior finish

✔ Precision handcrafted internal chambers

✔ Improved exhaust flow characteristics

✔ Installer-friendly universal design

✔ Made in North America

Specifications

• Part Number: SF42542
• Series: Street Flow
• Muffler Style: 2-Chamber
• Inlet: 2.5" Center
• Outlet: 2.5" Offset
• Body Size: 4" × 9.5" Oval
• Body Length: 13"
• Overall Length: 19"
• Material: 16-Gauge Aluminized Steel
• Finish: High-Heat Satin/Silver Finish
• Sound Level: Moderate to Aggressive
• Configuration: Non-Reversible
• Universal Fitment
• Warranty: 3-Year Limited Warranty

Ideal For

• Muscle cars
• Classic restorations
• Performance trucks
• Street rods
• Jeep builds
• Custom exhaust systems
• V8 performance applications
• Off-road vehicles