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not going to lie that setup has to be one of the quietest setups with a header. the Q300 catback is as quiet as stock (within 1or 2 db). is it droning or is it just loud? because that's as far as i know that's setup people are using to be quiet. it's 2.5" all the way so restriction is not an issue at this point. with a turbo it might be, but not a supercharger till your in the mid 300s for whp.
which supercharger? and dyno's to prove the torque dip is still there? a good tune is going to totally eliminate that dip with a supercharger (of any type, especially with a UEL header).
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