Price: $4 - Set
The brass orifice screws into the injector bell of the motor system and regulates the flow of N2O into the fuel grain. The orifice then determines the motor configuration for the particular motor system being used as shown in the table below.
Motor Configurations (OLD DATA - WILL UPDATE WHEN NEW TMT AVAIL)
| Orifice\Motor System | 440cc | 835cc | 1685cc | 2800cc |
| .172 | I310 | J300 | L460 | L490 |
| .125 | J250 | K240 | L280 | |
| .110 | J220 | |||
| .098 | J175 | L150 | ||
| .086 | J150 | |||
| .076 | J110 |