The only other "cheap" one would be to advance your timing. Mine is set around 14-15 w/ 91 octane. Another somewhat cheap one would be a Pacesetter header. Although not the best, IMO, it is a bang for the buck deal. You save over $250+ compared to getting the Hotshot. And you still get a power increase.
You have to get the right type of stickers though. APC is only good for about 1-2 hp. However, something like a 'Powered by ____' is about 10hp. The ultimate performence is the time tested combo of Mugen, Type-R, and NOS, you've got a car in the 11s w/ those.
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