I was advised against PE's when getting my injectors by the same workshop who built Wai's car, so thats the advice I'm going off (even though I got Sard's at the time which caused problems regardless, so big FAIL for me until I got chop tops).

The problem comes to the fact that they are inconsistent.. some of the injectors are okay, and others arent. These ones might be okay.

If I was owning the car, I'd change them.. but I don't own the car, so its just an opinion.