The Vibrant LS engine fuel pressure adapter lets an aftermarket fuel pressure gauge mount to the factory fuel rail of a Chevy LS engine once the Schrader valve is removed. One end carries a female -4 AN thread and the other a female 1/8 in NPT thread, which also makes it useful for other gauge and sensor applications.
- Type: Fuel pressure gauge adapter fitting
- Application: Chevy LS factory fuel rail (Schrader valve removed)
- Thread 1: Female -4 AN
- Thread 2: Female 1/8 in NPT
- Part number: 16791
FAQ
What does the Vibrant 16791 adapter do?
It lets an aftermarket fuel pressure gauge mount to a Chevy LS factory fuel rail after the Schrader valve is removed.
What thread sizes does it use?
It has a female -4 AN thread on one end and a female 1/8 in NPT thread on the other.
Can it be used for other applications?
Yes. The -4 AN and 1/8 in NPT threads suit other gauge and sensor setups.

