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Mark I belive the torque specs are in inch lbs and I don't have my manual on the L to say for sure. I would just tighten them up till you feel its enough just don't strip any threads and you should be ok. If you want I can look tomarrow at work.
Hey Mark I looked in my manual and I could not find any torque specs for the blower or intake for the blower. I would tighten it to what you feel comfortable with.