"Buick Trademark(s) used with the written permission of General Motors"
| CFM | Venturi Diameter | Bore Diameter | ||
| primary | secondary | primary | secondary | |
| 400 | 1 1/8 | 1 1/4 | 1 7/16 | 1 7/16 |
| 500 | 1 3/16 | 1 1/4 | 1 7/16 | 1 11/16 |
| 575 | 1 1/4 | 1 9/16 | 1 9/16 | 1 11/16 |
| 625 | 1 3/16 | 1 9/16 | 1 7/16 | 1 11/16 |
| 750 | 1 7/16 | 1 9/16 | 1 11/16 | 1 11/16 |