So what are you questioning? If the shop did install F1's? As far as I know there's no identifying marks. Don might keep record of the s/n on the bodies if you want to verify. I heard at one point he was stamping F1 on the nozzles but have never seen it on the 5 or more sets I've handled.
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05 ram 3500 4x4 QC dually SOLD
05 2500 QC Laramie sport
Garmon built tranny
FI 63/68/.91 ETR-HO S480/92/1.25
dual pumps
105% injectors
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