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4 Bar MAP Sensor for GM 25203477 Supersedes # 12643955
Popular sensor for use with Holley EFI systems, particularly on LS engine applications.
This OEM quality 4-Bar MAP sensor reads up to 44psi of boost, and is a direct fit for intake manifolds with "LS3" style MAP sensor ports
Requires pigtail # 13580231, or the more common & cheaper LS9/LS3/LSA style connectors can be used if you trim the two bottom slots off the connector/pigtail.
Supersedes # 12643955