I don't race in True Street, but I'm positive that power adders are allowed. Willie Figuero (sp?) runs a truly awesome SN95 with a mondo blower and Igloo aftercooler. Its a totally awesome car to watch blast off really quick passes.
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Jeff Chambers
T/S #4
12.53 Seconds/109.3 MPH
http://www.kellnet.com/chambers/default.htm