There are things you can do, but they'll all cost hundreds of dollars and won't really make your car much faster. You can do basic intake and exhaust for at least $400 (for quality stuff) but it won't put the car anywhere near 225, 260 or 270 horsepower (depending on the TL). If you wanted a more powerful car, why in the world did you buy the 4 cylinder EX? 6 cylinder 240 hp LXs can be had for about the same price. And you can always add EX equipment to the LX, but you can't add the V6 to the EX.