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these headers include gaskets and necessary hardware for easy installation
1973-1974 GMC K15/K1500 Pickup
Quick & Easy Installation
1L L6 1973 - 1974 Oldsmobile Omega 250/4
7L V8 1975 - 1978 GMC K25 Suburban 400/6
Holley EFI Oil Pressure Gauge - 553-127 air-and-fuel-delivery these headers include gaskets andOverview: These analog style gauges are designed specifically for use with Holley EFI systems. They are compatible with all Terminator, HP, and Dominator ECU's, allowing them to be installed in a variety of Holley EFI equipped vehicles. CAN bus communication allows the gauges to daisy chain using the included stereo cables, making installation quick and clean. The required gauge module (P N 554 130) allows plug and play communication between the ECU
