are there different levels of muzzy duals for the 660s? i know for my kfx700 muzzy makes a standard , pro and super pro. all different sounds all make different power. i see muzzy duals on ebay from 650 on up to 900 something..
Mike, there is oly one headpipe version for the 660s. The only options are color/finish of the muffler cans, and the whisper cores. Call us tomorrow or PM my Sales Manager "Team Benchmark" for a great price.
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