2.5 inch front pipe and over pipe to 3 inch catback opinions (Please give your advice
 

Alright guys so I have a tomei UEL header and am looking to go with VDS front pipe and over pipe combo which I've head on a few cars and sounds mean! I was thinking greddy evo gt catback to go with it but I didn't think it made sense to go 3 inches after starting at 2.5. Problem is, my car will have an edelbrock super charger thrown in it by the beginning of the new year and the goal is 300 to 350 hp. Can I keep the exhaust 2.5 inches and still get there or will I lose significant power? I will also be putting different fuel injectors. Also will greddy evo gt catback scrape when I lower my car? It seems to hang very low in pictures and that worries me.

Thanks fellas!

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2.5" can flow just fine with those numbers. Just deleted the cats and resonator to remove any flow restrictions.

It will be super charged by the beginning of next year. I am think ahead and curious if being 2.5 will reduce my hp gains by a lot

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