Flowmaster 70 Series Big Block II
The 70 Series Big Block II is designed using a large Flowmaster case for maximum volume and efficiency. The case is two inches narrower than Flowmaster's original Big Block Muffler, making for easier installation in tight applications. The 70 Series offers a mild mellow exhaust tone and incorporates a Resonant Tuning Chamber for reduced interior sound levels.
Application Recommendations:
- Best suited for truck applications - quiet operation!
- Features three-chamber, Delta Flow Technology
-
Constructed of 16-guage aluminized or 409S stainless steel!
- Fully Mig-welded for maximum durability!
| Description | Part No. | List Price |
Click For Details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 2.25" Outlet Diameter: 3" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
524703 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 2.25" Outlet Diameter: 2.25" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
524704 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
52571 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
52572 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
52573 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
53070 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 3" Outlet Diameter: 2.50" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
530702 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
53071 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
53072 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER Inlet Diameter: 3" Outlet Diameter: 2.25" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
530722 | $303.27 |  details |
| FLOWMASTER 70 SERIES BIG BLOCK II MUFFLER STAINLESS STEEL Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 5" OAL: 28" Case Length: 22" Width: 10" Height: 5" Weight: 16 |
853072 | $312.75 |  details |