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This fabricated steel muffler is ideal for use at tracks that recommend mufflers but do not have a decibel rule. The mufflers are 4" x 4" square and have a 3 1/2" inlet and outlet. They are 13 1/2" long and weigh only 3 1/2 pounds. Tested on dirt late models and Wissota modifieds these mufflers met 100 db at 100 feet.
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