Granatelli GM LS & LT 0-Ohm 12" Yellow High-Temp Spark Plug Wires – 28-1629HTY

Make your ignition system stand out while delivering the spark performance your LS or LT deserves. Granatelli 12-inch yellow 0-Ohm wires combine bold engine-bay styling with high-temperature construction and a direct path for maximum available ignition energy.

The Granatelli 28-1629HTY 0-Ohm High-Performance Spark Plug Wire Set is designed for performance applications that benefit from a longer 12-inch boot-to-boot wire length. The extra reach provides additional routing flexibility around headers, brackets, accessories and relocated ignition coils while maintaining a clean, controlled installation.

Built with 8mm yellow high-temperature silicone insulation rated beyond 500°F and a stainless-steel spiral-wound core, these wires deliver the heat resistance, EMI/RFI suppression and true 0-Ohm performance needed for demanding street, strip and high-horsepower GM LS & LT applications.

BOLD COLOR. ZERO-OHM PERFORMANCE. SERIOUS SPARK.

GUARANTEED 5–10 HP GAIN

Naturally aspirated applications can see a measurable horsepower increase, while supercharged, turbocharged and nitrous combinations may see even greater gains.

Key Features

• True 0-Ohm resistance for maximum available ignition-energy transfer
• 12" overall length – measured boot end to boot end
• 8mm yellow high-temperature silicone insulation
• Heat resistant beyond 500°F
• Stainless-steel spiral-wound core helps suppress EMI & RFI interference
• Designed for compatible GM LS & LT coil-near-plug ignition applications
• 12-inch length provides additional flexibility for custom routing
• Excellent for headers, relocated coils and modified engine bays
• OE-style connections for straightforward installation
• Compatible with modern ECUs and aftermarket tuning systems
• Excellent for naturally aspirated, supercharged, turbocharged and nitrous applications
• Pre-assembled – no cutting, trimming or crimping required
• Complete V8 set – 8 wires
• Made in the USA

More Length for Better Routing: The 12-inch boot-to-boot configuration gives you additional freedom to route around headers, accessories, brackets and custom coil locations. This added reach can help reduce tension on the terminals while keeping the installation clean and organized.

0-Ohm Technology for Maximum Spark Delivery

Granatelli's 0-Ohm conductor design is engineered to minimize resistance between the ignition coil and spark plug so the maximum available coil energy reaches the plug. Strong and consistent spark delivery becomes increasingly important as RPM, cylinder pressure, boost and horsepower increase.

12" Length for Flexible LS & LT Routing

The 12-inch boot-to-boot length makes the 28-1629HTY a strong choice for LS swaps, custom engine bays and relocated coil setups where shorter wires may limit routing options. The additional length allows you to position the wires more carefully around headers and other high-temperature components.

High-Temperature Yellow Silicone Construction

Performance headers, turbo systems and exhaust components can create intense under-hood temperatures. The 8mm yellow high-temperature silicone jackets are rated beyond 500°F, providing durable protection against heat, abrasion and demanding operating conditions while giving the engine bay a distinctive performance look.

Performance Without Electronic Interference

A stainless-steel spiral-wound inner core helps suppress EMI and RFI interference, helping protect the ECU, ignition controller and other electronic systems from unwanted electrical noise while maintaining Granatelli's 0-Ohm performance.

Compatible GM LS & LT Applications

Designed for compatible GM coil-near-plug ignition applications using the correct 12-inch boot-end-to-boot-end wire configuration. Granatelli specifically identifies several popular LS-family engines for this wire set.

Common Engine Sizes

Important Fitment Notice: These wires measure 12 inches from boot end to boot end. Engine family or displacement alone does not guarantee physical fitment. Compare your existing wire length, ignition coil location, spark plug boot configuration and routing before ordering.

Heat Notice: The high-temperature silicone construction provides increased heat protection, but proper clearance from headers and other extremely hot exhaust components is still recommended whenever possible.