http://www.scca.com/_FileLibrary/File/07-f...ugust-final.pdf

Effective 1/1/08: Change section 9.1.3.D.1.a.6 and add a new section 7 as follows:

<strike>6. Fuel injected cars may alter or replace the engine management computer, or ECU, provided that all modifications are done within the original OEM ECU housing. Only the stock (unmodified) OEM ECU connection to the wiring harness may be used. The allowance to modify the ECU in no way permits the addition of wiring, sensors, or piggybacked computers outside of the OEM ECU housing. The stock (unmodified) wiring harness must be used. The installation of a resistor is allowed between the sensor and the OEM wiring harness. Adjustable fuel pressure regulators are permitted.
</strike>

6. The engine management computer may be altered or replaced. A throttle position sensor and its wiring may be added or replaced. A MAP sensor and its wiring may be added. Other existing sensors, excluding the stock air metering device, may be substituted for equivalent units.

7. Wires and connectors in the engine wiring harness may be modified or replaced.