Does anyone know anything about the delphi FJ10034 4 hole upgraded fuel injectors for our Northstars? I need to replace a set of original delphi FJ10034 2 hole ones, with 250k+ on them. Can get a set of the upgraded ones for bout 70$ They look slimmer, but have same part #, and the chart saz they fit my 99 Deville, but I'm suspicious. Has anyone used these, or have any info about em? Thanks!