fuel pressure regulator help

[RiversideS13]

Hi i am about to replace my oem fuel pressure regualtor with an aftermarket oem spec regualtor. Beside i process it, i want to know if there is any o-ring or seal i need to replace once i take out the fpr?

also i was told that i dont need to remove the fuel rail to install the fpr, is that correct?

any tip to replace the fpr?

thanks alot

[fliprayzin240sx]

Well it should already come with a o-ring. Only 2 screws hold the fpr on the rail. KA fprs are in the back side of the rail towards the fire wall while SRs are up front. If your running an adjustable fpr, id suggest running a small fuel pressure gauge so you can play with it a bit.