I didn't look for anything to be able to use them 'open' because that would interfere with the O2 sensor for the EFI that is in the 'head pipe' position of the muffled exhaust. I didn't want the sensor offending the view of the 'lake pipes' in order to use it when they were open... since I figured I might actually open them for 15 minutes once or twice a year.... I'm okay with them just being blocked off. It will sound pretty rowdy with just the exhaust as is.
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