Proflow’s fuel pressure adapter for the GM LS engine are designed to allow you to mount a Fuel pressure gauge on your fuel rail via the Schrader valve port. It has an AN4 female to 1/8 NPT thread which allows the gauge to be screwed in directly to the rail. Constructed from high quality billet aluminium and black anodised. Can also be used on LS1 if used in conjuction with a 1/8NPT x 90 degree male / female fitting.

Note: Schrader valve needs to be removed in order to allow fuel pressure gauge to recieve fuel pressure.