I would suggest suspension before power. Camber, coilovers and swaybars to make better use of the power that the car has already.
Tri-State Sports Car Council/Chicago Region SCCA/Milwaukee Region SCCA
Do better every run.
2002 ZX3 (daily)
1990 CRX Si STS (project)
2007 Pontiac Solstice Club Sport ZOK (autox)