I am willing to bet money that you are assuming you need a fuel pressure regulator because of what you've been told about Hondas and Acuras.
Honda (and it's North-American offshoot Acura) uses MAP sensors on their engines to determine fuel needs of the car. MAP stands for Manifold Absolute Pressure. It's a big-ass long name, but it's function is very simple: it measures the air pressure inside your intake manifold. The problem is, the air pressure inside your manifold doesnt' change much when you slap on modifications.
Even though the motor is getting maybe 20% more air than it used to, the pressure doesn't change, and as such the computer doesn't know to send more fuel. The H/A crowd fixes this by installing a higher pressure fuel regulator.
Our cars do not work this way.
The Hyundai Tiburon/Elantra lineup (well, I should say MOST of the Elantras) uses a MAF sensor -- Mass Air Flow. Rather than detecting air pressure, it actually detects total air mass that's coming into the motor. More modifications = more air coming in, and as such the computer can see the additional air and make appropriate changes to fuel.
The only time you need to adjust fuel pressure is when you have a modification that either the computer cannot see as air (nitrous) or when the total airflow exceeds the MAF's ability to read it all (supercharged / turbocharged)
The stock MAF sensor is good for around 180-210 flywheel horsepower (depending on temperature); you have lots more modifications to go before you touch that mark.
