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FREE 3-Day SHIPPINGdetails...

Shipping is free via UPS Ground or 3-Day Select for orders of $25 or more (excludes transmissions). If the transit time using UPS Ground Shipping will exceed 3 days to your location, we will upgrade the shipping service to UPS 3-Day Select, at no cost to you.

Free shipping is available within the continental U.S. only. Shipping charges will apply to all other destinations.

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FLOWMASTER 70 SERIES BIG BLOCK II MUFFLERS

The 70 Series Big Block Muffler uses a longer case for increased volume and added sound reduction that will still fit many applications where the wider 50 Series Big Block muffler won’t fit. The 70 Series Big Block utilizes Flowmaster’s patented Delta Flow Technology for maximum efficiency and minimum interior resonance street cars, most trucks, SUV’s, RVs and tow vehicles that require quiet operation with improved sound.

  • Best suited for truck applications – quiet operation!
  • Features three-chamber, Delta Flow Technology
  • Constructed of 16-gauge aluminized steel
  • Fully MIG-welded for maximum durability
  • Covered by three year warranty

 

FM_70_Series_Cutaway

 

 

 

70 Series Big Block II Mufflers

IN/OUT C/C O/C C/O O/O O/O SAME SIDE
2.50" 52571 52572 52573
3.00" 53070 53071 53072
853072
IN/OUT D/C C/D D/D O/D
2.25"/2.25" 524704
2.25"/3.00" 524703
3.00"/2.25" 530722
3.00"/2.50" 530702 530712