Denso fuel Injector
uscar port
4 Hole nozzle

Flow rates @ 43.5 psi / 3 bar
29.9 lb per hour
226 G per min. (N-Heptane)
314.2 cc per min

GM L59 Flexfuel motor

Denso 4581 / 195500-4581
GM 12580426
AcDelco 2171626

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other part numbers
Bostech MP3120
GB Reman 832-12114
SMP FJ502
Airtex 4G1686