According to Greg the larger throttlebodies should help. The stock Gen.1 throttle bodies are 58mm. I didn't dyno the car before putting the 65mm throttlebodies on it so I can't say how much difference they make. You have to open up the manifold to match up with the larger throttlebodies.
I purchased an underdrive pulley from Parts Rack. I was skeptical because I have heard some people say that they are a waste of money and some say that they saw a rwhp increase. I dynoed my car last Sunday and the result was 480 rwhp. I installed the underdrive pulley and did another dyno run...
Dynoed my Gen.1 today and here is the results: 480 RWHP and 541 RWT. I am pretty happy with the numbers. I am running lean and only did one pull. There is more power to be had.
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