new exhaust

I got a new stock rear section for my car today. I just needed it so that i could pass inspection. Once I get the money im gettin a custom catback. I noticed one thing when i took it for a test drive. I have more low end power and torque but less high end. I had a hole in my muffler so it was pouring out exhaust like crazy. When I get a catback with 2 1/4" or 2 1/2" piping I know im gonna gain high end, but will I lose more low end?

how much torque and low end power would i lose if i got a more free flowing exhaust? Is it really noticable?

You should gain more of both

Gains!

2.25" is all you'll need. 2.5 is a bit overkill.

well thats good. But i passed inspection with flying colors so im gonna treat my car to some paint (just to make the shaved emblems match the rest. Its the stock red so i went to autozone and got a can of the closest red i would find (i think its called miranda red or something which it says is a stock honda red) so im gonna do that my next day off when i get home from doing whatever after school. Im just gonna sand it down so its smooth and then spray it with this technique some guy told me about so that its all faded together.

spray paint = bad