Pre outs? Who knows? But it's simple to add on a subwoofer regardless of factory preouts or not. If that's your end goal.
As for voiding audio warranty lol!!!!! That's a good one. That's pretty much gone after the first 20-30k miles or within the first year. So I wouldn't even bother.
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New daily driver - Subaru BRZ Premium
Weekend fun/track car - '91 MR2 Turbo Gen3
Old daily driver - '88 MR2 Supercharged
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