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Flowmaster 70 Series Big Block II Mufflers


Flowmaster
Flowmaster 70 Series Big Block II Mufflers

Product images may differ from actual product appearance.

70 Series Big Block II Mufflers combine Flowmaster's Delta Flow technology with a three-chamber design for maximum efficiency and performance. They offer quiet operation with improved sound.

Features
  • For truck, SUV, RV, towing, and high-performance street car applications
  • Mild to stock exterior sound level with mild interior resonance
  • Longer case for increased volume and reduced noise
  • Case: 22" L (5" Thick)
  • Overall: 28" L x 10" W
  • Aluminized 16-gauge steel or 409S stainless steel
  • Aluminized has 3-year warranty
  • Stainless has limited lifetime warranty
  • MIG welded for maximum durability

    Click to listen: Click to Listen 70 Series Big Block II Muffler



  • 18 Products

    Center In/Center Out

    389-52570
    70 Series Big Block II Muffler
  • Center In/Center Out: 2.5"
  • Aluminized Steel
    More info on Flowmaster 52570

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Order Today Ships 04/21/14

    389-53070
    70 Series Big Block II Muffler
  • Center In/Center Out: 3"
  • Aluminized Steel
    More info on Flowmaster 53070

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-853070
    70 Series Big Block II Muffler
  • Center In/Center Out: 3"
  • Stainless Steel
    More info on Flowmaster 853070

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $149.48
    Ships

    Center In/Offset Out

    389-52572
    70 Series Big Block II Muffler
  • Center In/Offset Out: 2.5"
  • Aluminized Steel
    More info on Flowmaster 52572

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-53072
    70 Series Big Block II Muffler
  • Center In/Offset Out: 3"
  • Aluminized Steel
    More info on Flowmaster 53072

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Order Today Ships 04/21/14

    389-853072
    70 Series Big Block II Muffler
  • Center In/Offset Out: 3"
  • Stainless Steel
    More info on Flowmaster 853072

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $149.48
    Ships

    Offset In/Center Out

    389-52571
    70 Series Big Block II Muffler
  • Offset In/Center Out: 2.5"
  • Aluminized Steel
    More info on Flowmaster 52571

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-53071
    70 Series Big Block II Muffler
  • Offset In/Center Out: 3"
  • Aluminized Steel
    More info on Flowmaster 53071

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-853071
    70 Series Big Block II Muffler
  • Offset In/Center Out: 3"
  • Stainless Steel
    More info on Flowmaster 853071

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $149.48
    Ships

    Offset In/Offset Out

    389-52573
    70 Series Big Block II Muffler
  • Offset In/Offset Out: 2.5"
  • Aluminized Steel
    More info on Flowmaster 52573

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-53073
    70 Series Big Block II Muffler
  • Offset In/Offset Out: 3"
  • Aluminized Steel
    More info on Flowmaster 53073

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-853073
    70 Series Big Block II Muffler
  • Offset In/Offset Out: 3"
  • Stainless Steel
    More info on Flowmaster 853073

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $149.48
    Ships

    Offset In/Dual Out

    389-530712
    70 Series Big Block II Muffler
  • Offset In 3"/Dual Out 2.5"
  • Aluminized Steel
    More info on Flowmaster 530712

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Order Today Ships 04/21/14

    Center In/Dual Out

    389-530722
    70 Series Big Block II Muffler
  • Center In 3"/Dual Out 2.25"
  • Aluminized Steel
    More info on Flowmaster 530722

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Order Today Ships 04/21/14

    389-530702
    70 Series Big Block II Muffler
  • Center In 3"/Dual Out 2.5"
  • Aluminized Steel
    More info on Flowmaster 530702

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    389-8530702
    70 Series Big Block II Muffler
  • Center In 3"/Dual Out 2.5"
  • Stainless Steel
    More info on Flowmaster 8530702

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $149.48
    Ships

    Dual In/Center Out

    389-524703
    70 Series Big Block II Muffler
  • Dual In 2.25"/Center Out 3"
  • Aluminized Steel
    More info on Flowmaster 524703

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Order Today Ships 04/22/14

    Dual In/Dual Out

    389-524704
    70 Series Big Block II Muffler
  • Dual In/Dual Out: 2.25"
  • Aluminized Steel
    More info on Flowmaster 524704

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
  • $144.99
    Ships

    18 Products