Flowmaster Big Block II Mufflers

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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.