Description
Overview
The Flowmaster 70 Series Chambered Muffler is engineered for enthusiasts who want a refined, controlled exhaust note without giving up performance. Built around Flowmaster’s proven Delta Flow® technology and an enlarged case, the 70 Series is designed to deliver improved sound control alongside real-world mileage and power gains. It’s a smart choice for drivers who spend time towing, hauling, or cruising and simply want a cleaner, more livable exhaust tone.
This muffler falls into Flowmaster’s 70 Series Big Block lineup and carries a mild sound level, making it ideal for those who appreciate a deeper presence up front while keeping in-cabin drone to a minimum. Whether it’s bolted under a daily-driven truck or a high-performance street car, the 70 Series is built to perform where space allows.
Built to Last
Durability is at the core of this design. The 70 Series is constructed of 16 gauge aluminized steel and is fully MIG welded for maximum strength and long service life. A high-temperature paint finish helps the case stand up to the heat and demands of everyday driving. This is a muffler built to take the abuse of trucks, SUVs, RVs, tow vehicles, and street/strip applications alike.
Key Benefits
- Delta Flow® technology for improved sound control with mileage and power gains
- Enlarged case design that helps tame drone while maintaining flow
- 16 gauge aluminized steel construction, fully MIG welded for maximum durability
- Mild sound level for a refined, drivable exhaust note
- High-temperature paint finish to withstand under-vehicle heat
- Universal fitment with a 3.00-inch inlet and dual outlet configuration
Fitment & Configuration
This muffler features a 3.00-inch inlet diameter and a dual outlet location, giving you flexibility in how it integrates into your exhaust system. As a universal-fit component, it’s intended to be installed where space allows, making it a versatile upgrade across a wide range of platforms. Please note that exhaust tips are sold separately, so you can pair the muffler with the tip style that best suits your build.
Ideal Applications
Flowmaster designed the 70 Series with real-world versatility in mind. It’s perfect for use on trucks, SUVs, RVs, tow vehicles, and high-performance street cars where a balance of sound quality and performance matters. If you regularly tow or want a quieter, more comfortable cabin without sacrificing the benefits of a quality performance muffler, the 70 Series Big Block delivers exactly that combination.
Carrying an emission code of 5 and classified for street/strip use, the Flowmaster 70 Series Chambered Muffler is a dependable, performance-minded upgrade for drivers who demand both durability and a well-mannered exhaust tone.










