I agree, something that effeicient would cost alot more. Plus it is too long and kinda narrow. This will give you trouble in mounting as you will have to get it custom mounted because it is over 7" longer than stock plus the pipes will have to be mounted on top of that 25 inches.
Like MKIIINA said, go with a stock, new or used. Even though it does have a nasty psi drop, it will do what you want. But if you are unsatisfied with this, go aftermarket, but something near the same size or a bit bigger than stock. Any bigger is kinda useless because it will be just too big for what you want.
Hope this helps.