I really hate to ask these things here, cause, well, you know....... but I did read the GCR/ITCS.

I want to adjust the fuel pressure on my car, a 1990 CRX. There are hoards of readily available bolt-on adjustable FPR's out there. They bolt to the fuel rail, and replace the factory unit.

Legal, or not?? And, if the answer is no, can I remove the factory unit, and REPLACE it, with an external unit? The only reference to FPR's in the GCR is "an external fuel pump pressure regulator may be installed"

Thanks everyone,

Jon