North American (1987-1990). The plastic high-flow heater assembly has been used on the following systems:
A. 1989-1990 605 Systems
B. All 1987-1990 624 Systems
C. 1989-1990 701 Systems
D. 1989-1990 724 Systems
Note: For complete housing assembly, order part numbers 7, 8, 11, and 12.