Not sure if it will.
I know I was just smacking on 18psi with the stock turbos with my current custom/methanol dyno tune file from LMS.
I see no reason why that wouldn't remain the same.
I discussed it at length both prior to turbo install, and then again today with my mechanic friend & he's pretty confident it'll remain as the tune is set now.
So, I should be all good to go.
Besides 4DR, as you and I have personally discussed, with the onset of Winter quickly approaching here in Chicagoland, I won't be driving like an @ss (for lack of better terms) anyhow.
New tune, or not.
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