Flowmaster Original 40 Series Muffler
Part# - 42543
2.5" Offset Inlet / 2.5" Offset Outlet
4" Thick - 9.75" Wide - 19" Overall Length - 13" Case Length

The American Thunder 40 Series is the most aggressive sounding street and strip muffler in Flowmaster's product line. If you are looking for the original "Flowmaster Sound," the 40 Series is the one. The performance street and strip muffler will also generate interior resonance within the vehicle. So if you want to really hear your exhaust system inside the vehicle as well as outside it, the 40 Series is for you.

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