I'm using the 80# Deka 'long style' on a magnuson supercharged 6.0L
I felt the car idles just great, and low speed drives great.
Sorry I do not have experience with TermX system...to know what it works with.
The knock offs area real problem...I have set of 60# knock offs now in a car...and they have to be swapped. Can't get the AFR where we need it, they don't respond like they should. Idle sucks...no atomization. These were sold by "TRE" The Racers Edge. Total junk.
this place sells real Siemens stuff:
http://www.siemensdeka.com/product-c...uel-injectors/
depending on the year and type intake you are using, if you have an injector out of it just measure the length from o-ring to o-ring to determine if you need short, mid, long (37/48/60mm). otherwise mockup the rails and try to get a measurement.
For connector style, this would be driven by your harness connector choice. if your harness has the USCAR connectors on it, get the EV6 connection type. USCAR type connectors are the ones with gray or green plastic CPA that you seat after they are mated. Earlier EV1 type use the metal wire clips in them, and the latching features are on the sides of the interface. There's likely more choices in the later USCAR type EV6 in my opinion