• The Flowmaster 70 Series Big Block II Muffler is specially-made for big trucks, SUVs, RVs and any other towing vehicle
  • Accommodates maximum exhaust volume for handling huge engines at maximum load
  • Provides outstanding boosts to power and torque to towing excellence
  • The Flowmaster 70 Series adds a throaty mild exhaust tone to your vehicle without overpowering volume
  • Utilizes Flowmaster's exclusive Delta Flow technology for superior scavenging and minimal interior resonance
  • Quality Flowmaster muffler crafting uses aluminized steel for corrosion resistance and precise mig welds for maximum durability
  • Casing embossed with the Flowmaster name
  • Fits vehicles that do not match the 50 Series Big Block Muffler
  • Your Flowmaster 70 Series Big Block II Muffler carries a 3-year warranty

 
70 Series Big Block II Muffler
70 Series Big Block II Muffler
From: $138.01
 
Part NoApplication
524704Flowmaster Inlet/Outlet: 2.25 Dual IN / 2.25 Dual OUT 70 Series Big Block II Muffler
524703Flowmaster Inlet/Outlet: 2.25 Dual IN / 3.00 Center OUT 70 Series Big Block II Muffler
52570Flowmaster Inlet/Outlet: 2.50 Center IN / 2.50 Center OUT 70 Series Big Block II Muffler
52572Flowmaster Inlet/Outlet: 2.50 Center IN / 2.50 Offset OUT 70 Series Big Block II Muffler
52571Flowmaster Inlet/Outlet: 2.50 Offset IN / 2.50 Center OUT 70 Series Big Block II Muffler
52573Flowmaster Inlet/Outlet: 2.50 Offset IN / 2.50 Offset OUT 70 Series Big Block II Muffler
52574Flowmaster Inlet/Outlet: 2.50 Offset IN / 2.50 Same Side OUT 70 Series Big Block II Muffler
530722Flowmaster Inlet/Outlet: 3.00 Center IN / 2.25 Dual OUT 70 Series Big Block II Muffler
530702Flowmaster Inlet/Outlet: 3.00 Center IN / 2.50 Dual OUT 70 Series Big Block II Muffler
53070Flowmaster Inlet/Outlet: 3.00 Center IN / 3.00 Center OUT 70 Series Big Block II Muffler
53072Flowmaster Inlet/Outlet: 3.00 Center IN / 3.00 Offset OUT 70 Series Big Block II Muffler
530712Flowmaster Inlet/Outlet: 3.00 Offset IN / 2.50 Dual OUT 70 Series Big Block II Muffler
53071Flowmaster Inlet/Outlet: 3.00 Offset IN / 3.00 Center OUT 70 Series Big Block II Muffler
53073Flowmaster Inlet/Outlet: 3.00 Offset IN / 3.00 Offset OUT 70 Series Big Block II Muffler
53074Flowmaster Inlet/Outlet: 3.00 Offset IN / 3.00 Same Side OUT 70 Series Big Block II Muffler