• Top Street Performance GM LS Ignition Coil Extension Cable - Ignition Coil Harness
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Top Street Performance

GM LS Ignition Coil Extension Cable

GM LS Ignition Coil Extension Cable

SKU: 81021

$27.15
$27.15 $30.85
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In stock

Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • Extends factory harness reach for one bank of 4 LS coils
  • 24" length, single connector on each end
  • Fits GM LS-based V8s (Gen III/IV) — 4.8L to 7.0L
  • Two cables needed for a full 8-coil LS V8 (one per bank)

Description

This 24" extension cable extends the factory ignition coil harness reach for LS-based GM V8 engines, serving one bank of four ignition coils. It's designed for LS-swap projects, coil relocation, and ignition harness repair where the factory harness length isn't sufficient.

This cable serves one bank (4 coils) only — a complete LS V8 (8 coils total) requires two of these cables, one per bank. It is not compatible with distributor-based (Gen I/II) small block or big block engines, which use an entirely different ignition architecture.

Fits the Chevrolet small block V8 Gen III/IV (LS-based) family: 4.8L (293 in³), 5.3L (325 in³), 5.7L (346 in³, commonly called 350), 6.0L (364 in³), 6.2L (376 in³), and 7.0L (427 in³).


Applications
Fits Chevrolet small block V8 Gen III/IV (LS-based) engines: 4.8L, 5.3L, 5.7L (350), 6.0L, 6.2L, 7.0L. Common on LS-swap and custom LS ignition wiring, coil relocation projects, and LS ignition harness service and repair.

Coverage
This cable serves one bank of four ignition coils only. A complete LS V8 (8 coils total) requires two cables, one per bank. Not compatible with distributor-based (Gen I/II) small block or big block engines.

Specs

Cable TypeIgnition Coil Extension Harness
End 1 Terminal Quantity1
End 2 Terminal Quantity1
Length24 in.
Length24"
Quantity1

Engine Fitment

COMPATIBLE WITH
CHEVROLET SMALL BLOCK V8 GEN. III/IV (LS BASED)
• 4.8 L / 293 in3
• 5.3 L / 325 in3
• 5.7 L / 346 in3 commonly referred to as 350
• 6.0 L / 364 in3
• 6.2 L / 376 in3
• 7.0 L / 427 in3

NOTES
This cable serves one bank of four ignition coils only — a full LS V8 (8 coils total) requires two of these cables, one per bank. Not compatible with distributor-based (Gen I/II) small block or big block engines, which use a different ignition architecture entirely.

COMMON VEHICLE APPLICATIONS
LS-swap and custom LS ignition wiring
Coil relocation projects on LS-based engines
LS ignition harness service and repair

Q&A

How many of these cables do I need for my LS engine?
Two — this cable serves one bank of four coils only, and a complete LS V8 has eight coils across two banks.

Will this fit a Gen I or Gen II small block Chevy?
No — this cable is designed for LS-based Gen III/IV engines only. Gen I/II small block and big block Chevrolet engines use distributor-based ignition systems and are not compatible.

What LS engines does this fit?
This cable fits the Chevrolet Gen III/IV LS-based small block V8 family, including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L applications.

How long is this cable?
24 inches.

What's this cable typically used for?
It's commonly used for LS swaps, custom ignition wiring, coil relocation projects, and LS ignition harness service or repair.

Emissions Notice

This product does not affect vehicle emissions and is not subject to emissions compliance regulations.