Will I need a HO Alt?

Yeah I'm trying to avoid an alternator upgrade. I know it was said somewhere before that civics generally have a weak alternator, but with the engine swap to the GSR gives me a different alternator. I'm not sure if its a generally better alt or by how much, but if I do the big three and run a better battery under my hood, do you guys think I should be fine? Or even running a second battery? What would you say is absolutely needed?

 
I'm assuming they're 12's since I could only fit 1 ported 15 in a Civic in the proper box? which if powered correctly should bring you to at least 1500W for your substage Plus other accessories. An alt wouldnt be a bad idea for any furture upgrades but the main battery + big 3 is a must..

 
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IBmikexxx

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