Also this check can be used as a port check valve which can be adjusted to a set pressure to regulate when the port nozzles come on.
The hi-speed check has both ends male 37 degree JIC as the port check is 37 degree JIC on one end and -8 ORB on the other end with a reverse flare.
Please specify port or hi speed check and spring pressure when ordering and if your not sure let RBS help you.
Hi-speed version uses 7/16-20 thread in Enderle or Crawford jets.
Racer can choose check valve type from drop down menu.