Loads of LS swaps get stymied in an surprising place: the ultimate valuable ft of ignition wiring. That’s as a result of a inventory GM LS wiring harness usually makes use of a pair of standalone sub-harnesses to attach every coil pack again to the primary harness. These sub-harnesses are sometimes lacking or hacked up in a number of junkyard LS engine pulls.
Maybe extra importantly, these sub-harnesses may be topic to vibration and intense warmth cycles, which accelerates their deterioration—and contemplating the earliest LS engines are over twenty years previous, it signifies that yours could also be due for substitute.
If any of this sounds acquainted, you then’ll most likely need to hear concerning the Summit Racing Ignition Coil Wiring Harnesses for GM LS engines.
Heading to a scrapyard to seek out an LS engine? Begin with our LS Engine Spotter’s Guides:
* Part 1: Matching the Vehicle to the Engine
* Part 2: Matching the Engine to the Vehicle
No want to fret about chopping or splicing wires right here, these Summit Racing Ignition Coil Wiring Harness are plug-and-play, utilizing the manufacturing facility connectors to hook proper as much as stock-style LS ignition coils with coil-on-plug terminals.
Every sub-harness is made with longevity in thoughts, with sturdy elements that’ll stand as much as miles of abuse.
Lengthy story brief, these harnesses are a wise substitute for a broken or lacking one—and you won’t have to spend a weekend scouring junkyards to find them.
Oh, and in the event you want the ignition coil harness for the 5.7L LS1 engine present in sure 1999-2005 GM automobiles just like the Corvette, GTO, Camaro/Firebird, and CTS-V, Summit Racing’s received you lined there, too. Take a look at half quantity SUM-890107.