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Applications for HLY-558-503
Holley EFI Systems Main Wiring Harnesses 558-503
HLY-558-503
Not Yet Reviewed
Part Number: HLY-558-503
Estimated Ship Date: Oct 19, 2026
Filters
Results Found: 4
Stock EFI System:
Yes
EFI System Manufacturer:
Holley
Universal:
No
Make:
CHEVROLET
Beginning Year:
1967
Ending Year:
2002
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Application Notes:
Includes Stealthram/TPI main harness, main power harness, injector harness, HEI ignition harness, ignition adapter, and tachometer input. Works with HP or Dominator ECU's.
Stock EFI System:
Yes
EFI System Manufacturer:
Holley
Universal:
No
Make:
CHEVROLET
Beginning Year:
1976
Ending Year:
2002
Engine Type:
V8
Engine Size:
5.0L/305
Engine Family:
Chevy small block Gen I
Application Notes:
Includes Stealthram/TPI main harness, main power harness, injector harness, HEI ignition harness, ignition adapter, and tachometer input. Works with HP or Dominator ECU's.
Stock EFI System:
Yes
EFI System Manufacturer:
Holley
Universal:
No
Make:
CHEVROLET
Beginning Year:
1967
Ending Year:
2002
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Application Notes:
Includes Stealthram/TPI main harness, main power harness, injector harness, HEI ignition harness, ignition adapter, and tachometer input. Works with HP or Dominator ECU's.
Stock EFI System:
Yes
EFI System Manufacturer:
Holley
Universal:
No
Make:
CHEVROLET
Beginning Year:
1976
Ending Year:
2002
Engine Type:
V8
Engine Size:
5.0L/305
Engine Family:
Chevy small block Gen I
Application Notes:
Includes Stealthram/TPI main harness, main power harness, injector harness, HEI ignition harness, ignition adapter, and tachometer input. Works with HP or Dominator ECU's.
