Instruction Sheets for Part Number HLY-558-437
Holley Drive-By-Wire Throttle Body Wiring Harnesses 558-437
Part Number: HLY-558-437
Holley Drive-By-Wire Throttle Body Wiring Harnesses
Fuel Injection System Wiring Harnesses, Holley EFI, Hemi Drive-By-Wire, Throttle Body Harness, for Holley Dominator EFI Only, Dodge, 5.7-6.4L, Each
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Estimated Ship Date: Oct 22, 2026 Would you rather pick it up?
Overview
Holley Drive-By-Wire Throttle Body Wiring Harnesses
Holley drive-by-wire throttle body wiring harnesses are designed for use with the Holley Dominator ECU, as well as the factory drive-by-wire throttle body. These harnesses feature pre-terminated connections, ensuring true plug-n-play installation.
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Some parts are not legal for use in California or other states with similar laws / regulations
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