Did this in my buddies 2001 GTP It was a big NOPE, the factory volume limiter would kick in and make everything quiet.
Amen. Plus IIRC I couldn't turn my bass all the way down. Took 2 weeks to budge and go aftermarket. Of course this was 4 years ago. I never looked back.
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Squirrels are my engine. I need a Ford Regal
04 Comp G.