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The Flowmaster Super 40 Series Muffler is the most aggressive street muffler Flowmaster offers. It has the deepest tone while retaining the classic two chamber race design.
This is the muffler you have been waiting for. The Flowmaster crew has been developing this muffler over the last two years to provide the best sound while retaining maximum performance.
This is the muffler you have been waiting for. The Flowmaster crew has been developing this muffler over the last two years to provide the best sound while retaining maximum performance. The body measures 4" x 9-1/2" x 13" long so it can fit up under your car.
What could be better than a 2-1/2" American Thunder dual exhaust for your 1955-57 Chevy car? This header-back aluminized 16-gauge kit includes head pipes, welded H-pipe, two Super 40 mufflers, mandrel bent tail pipes, stainless steel tips and mounting hardware.
One of the first things you do to improve performance on your 1967-1969 Camaro/Firebird is to upgrade the exhaust. Flowmaster's American Thunder dual exhaust kits will give you the ultimate in performance and sound.Includes aluminized 3" 16-gauge mandrel bent pipes from the crossmember back, H-pipe, Super 40 Series Mufflers and hardware. Ships in two boxes.
Flowmaster American Thundersystems are built with maximum performance and aggressive looks in mind. These systems follow the factory routing and utilize OEM hanger locations when possible. Featuresmandrel bent tubing for maximum performance and includeSuper 40 Seriesmufflers for just the right performance and sound. American Thunder Series benefits include improved throttle response, power and mileage.