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New in the box parts # 550-607N, purchased directly from Holley just 2 weeks ago. Never been installed or even mocked up. This is a 58x system set up for Bosch type injector connectors and and includes the upgraded NTK wideband O2 sensor.
02-16-2017, 07:09 AM
Holley HP EFI 550-607n 58x
