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Holley LS Extended-Length Main Engine Harnesses
Wiring Harnesses, Holley EFI, LS1/6, 24X/1X, Main Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 4.8-6.0L, Each
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Estimated Ship Date: Nov 9, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
558-133
Part Type:
Product Line:
Summit Racing Part Number:
HLY-558-133
Item Number:
7257246
UPC:
090127140758
Harness Length:
Extra-long
Fuse Block Included:
No
Quantity:
Sold individually.
Notes:
Designed for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
Holley LS Extended-Length Main Engine Harnesses
Holley LS extended-length main engine harnesses are 22 in. longer than previous harnesses. Designed to fit most 24x and 58x LS engines from 1997-2012, they are a perfect fit for installers wanting to mount any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access, such as on a roll bar or under the passenger seat.
Notes:
* Plug-and-play with Dominator, HP, Terminator X, and Terminator X Max ECUs
* LS1/6 harness interfaces with 24x crank and 1x cam sensors
* LS2/3/7 harness interfaces with 58x crank and 4x cam sensors
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