The circuit sports turbo elbow dramatically increases the exhaust flow. Therefore, producing more power. This is a very common bolt on upgrade for the sr20det engine.
* Does not come with Skinny O2 Sensor Adapter, must use DIF adapter or use FAT Type *
Use the either adapter below to work with the skinny O2 sensor.
Vehicle Applications
| Year | Make | Model | Trim | App Notes |
| 1989 - 1998 | Nissan | 180SX | All | None |
| 1989 - 1998 | Nissan | Silvia | All | None |
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