The 70 Series Big Block II Mufflers from Flowmaster are designed to offer increased performance while offering a deep, mild tone that won't offend the neighborhood. The 70 Series muffler is very similar in performance and tone to the 50 Series Big Block, however it uses a longer case design that works well on applications where the wider muffler won't work.
The 70 Big Block uses Flowmaster's Delta Flow technology to maximize efficiency and dampen interior resonance making it one of Flowmaster's quietest mufflers. It is designed for most cars, trucks, SUVs, & RVs with 2.5" or 3" exhaust systems. The 70 Series Big Block muffler has a case dimension of 22"L x 10" W x 5" H and a total length of 28". It is constructed of 16 gauge aluminized steel or T409 stainless steel for extended durability and life.
Flowmaster is offering a 3 year limited warranty on the aluminum 70 Series Big Block II Mufflers.
Flowmaster mufflers are designed to work with new or existing exhaust systems. They offer slip on installation and can be welded or clamped into place. Due to the use of heavier materials, Flowmaster recommends spot welding the joints when using clamps. On some applications it will be necessary to cut or splice when adding Flowmaster mufflers to an existing exhaust system.