Well in theory it would be a difference as colder air is more dense and therefore creates more power... how much actually works out in practice is not fully proven.
Do you just want to put the cone filter on your existing intake tube or do you want an actual shorty intake?
I say go for the intake. It makes a much nicer low end sound and you'll pick up a tiny bit of throttle response and fuel economy. As for heat shield or no, it really depends on if you have the money or not. The ones I see seem to restrict the air more than sheild it from hot air. I mean it's an accent... not a supercar... it's not like you're going to suddenly be a 10sec car with a heat shielded intake vs a 12 sec car without it.
Do you just want to put the cone filter on your existing intake tube or do you want an actual shorty intake?
I say go for the intake. It makes a much nicer low end sound and you'll pick up a tiny bit of throttle response and fuel economy. As for heat shield or no, it really depends on if you have the money or not. The ones I see seem to restrict the air more than sheild it from hot air. I mean it's an accent... not a supercar... it's not like you're going to suddenly be a 10sec car with a heat shielded intake vs a 12 sec car without it.