I'll jump in here before the flames flare up. There's not much that can be done, however most will tell you to search before you post. :rolleyes: And won't be too helpfull until you do.

There are Cold Air intakes, K&N filters, Timing Adjustments, Spark Plugs/Wires, Throttle Body Spacers, Replacing the Hydraulic Clutch fan with Electric, Etc. That can be used to gain a little HP, but the Results are rarely documented accurately IE. Dyno'd.

Good luck.

Edited to add, You probably are wasting your money on the Premium unless your timing is too advanced and you are getting pinging.