There are not to many ways to reduce weight but I can spread some good news.

The Type-R is rated curb weight at 2639 with AC and full tank of fuel.

If weighed with AC, 1/2 tnak and no passengers it weighs 2550 or less. My personal car with no spare, jack and with 929 wheels weighs 2520.

So there is 200 lbs for you :P

Now, I would say, flywheel, lightweight wheels, and spare, jack and rear seats are the most obvious places. You have AC and power steering if you are willing to give up the comforts.

Whatever you do PLEASE leave in the bumper rebar.

Trey