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Performance Exhaust, Performance Mufflers, Exhaust Systems, Catalytic Converter, High Performance, Race Magnum, High Flow Converter, Dynomax Exhaust, Super Turbo Muffler, Ultraflo Muffler, Dual Exhaust, Dual Exhausts, Dual Exhaust Pickups, Pickup Dual Exhaust, Truck Dual Exhaust, Truck Dual Exhausts, Magna Flow Mufflers, Magna Flow
   


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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!

70 SERIES BIG BLOCK II
28.00" OAL X 22.00" CASE X 10.00" WIDE X 5.00" THICK

Flowmaster 70 Series Big Block II

Flowmaster 70 Series Big Block II

Flowmaster 70 Series Big Block II

In Out Part
Number
2.50" 2.50" 52570
3.00" 3.00" 53070
409S STAINLESS STEEL
3.00" 3.00" 853070
     
In Out Part
Number
2.50" 2.50" 52571
3.00" 3.00" 53071
409S STAINLESS STEEL
3.00" 3.00" 853071
     
In Out Part
Number
2.50" 2.50" 52572
3.00" 3.00" 53072
409S STAINLESS STEEL
3.00" 3.00" 853072
     
70 SERIES BIG BLOCK II
28.00" OAL X 22.00" CASE X 10.00" WIDE X 5.00" THICK

Flowmaster 70 Series Big Block II

In Out Part
Number
2.50" 2.50" 52573
3.00" 3.00" 53073
409S STAINLESS STEEL
3.00" 3.00" 853073



In Out Part
Number
2.25" 3.00" 524703
     
     
     
     

In Out Part
Number
3.00" 2.25" 530722
3.00" 2.50" 530702
409S STAINLESS STEEL
3.00" 2.50" 8530702
     
70 SERIES BIG BLOCK II
28.00" OAL X 22.00" CASE X 10.00" WIDE X 5.00" THICK

In Out Part
Number
3.00" 2.50" 530712
     
     
     
     
In Out Part
Number
2.25" 2.25" 524704












In Out Part
Number
2.50" 2.50" 52574
3.00" 3.00" 53074











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