These are (8) refurbished GM truck 8.1L fuel injectors. They are in flow matched sets. All refurbished injectors have been resistance tested, flow and spray pattern tested, ultrasonically cleaned and back flushed. New O-rings, filters and pintle caps have been installed. These are a great option for those of you running a FBO/cammed 4.8, 5.3, 6.0 and still using the multec harness.
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