Iron Duke

The Iron Duke ... (insert history)

Year-to-Year Changes of the Iron Duke / Tech-4 in the Pontiac Fiero:

1984: - Crossflow design

1985: - Roller Cam (mid-year Update) - Formally renamed "Tech-4"

1986: - V5 A/C Compressor Upgrade

1987: - Elimination of ThermAC - Newer ECM (model) and Intake Air Temperature sensor - New Rochester TBI Unit - DIS Ignition

1988: - Balance Shaft - Integrated Oil Filter