Granatelli GM LS & LT 0-Ohm 12" Yellow High-Temp Kevlar-Boot Coil-Near-Plug Spark Plug Wires – 28-1629HTYB

If you're asking more from your LS or LT, your ignition system should keep up. Granatelli 0-Ohm wires are built to deliver the spark your engine is already capable of making—without unnecessary resistance holding it back.

Also fits

• 2020–2026 Chevrolet Silverado 2500 HD & 3500 HD 6.6L V8
• 2020–2026 GMC Sierra 2500 HD & 3500 HD 6.6L V8

The Granatelli 28-1629HTYB 0-Ohm High-Performance Spark Plug Wire Set is designed to transfer maximum available ignition energy directly from the coil to the spark plug, making it an excellent upgrade for naturally aspirated, boosted and heavily modified GM LS & LT applications.

Each wire measures 12 inches from boot end to boot end and features yellow high-temperature silicone wire with black Kevlar spark plug boots, giving you added heat protection, flexible routing and an unmistakable performance look under the hood.

GIVE YOUR SPARK A DIRECT PATH TO POWER.

DYNO-TESTED GAINS ON GM V8 POWER

Granatelli ignition is proven on the dyno. In LSX Magazine's Project C700 test, a ProCharged LT1 Corvette gained 19.26 rwhp and 18.73 lb-ft after switching to Granatelli coils and 0-ohm coil-near-plug wires, with nothing else changed. See the LSX Magazine dyno test. Results vary with the engine, tune and combination.

Key Features

• 0-ohm conductor design for maximum available ignition-energy transfer
• 12" overall length – measured boot end to boot end
• Yellow high-temperature silicone wire construction
• 8mm silicone jacket rated for temperatures above 800°F
• Black Kevlar spark plug boots for added heat protection and durability
• Spiral-wound stainless-steel core helps suppress EMI & RFI interference
• Designed for compatible GM LS & LT coil-near-plug ignition systems
• OE-style connectors for quick, secure installation
• Excellent for naturally aspirated, supercharged, turbocharged and nitrous applications
• Ideal for performance builds, aftermarket headers and custom routing
• Pre-assembled – no cutting or crimping required
• Complete V8 set – 8 wires
• Made in the USA

Easy Bolt-On Performance: The pre-assembled design and OE-style connectors make this a straightforward ignition upgrade. Remove your existing wires and install the Granatelli 0-Ohm set—no trimming, crimping or complicated ignition conversion required.

Why 12" Can Be the Better Choice

The 12-inch boot-to-boot length gives you additional routing flexibility compared with shorter wire configurations. This can be especially useful on custom builds, coil relocation setups or engine bays where the wire needs a cleaner path around headers, brackets and other components.

Built to Handle Serious Under-Hood Heat

Performance headers, turbo systems and high-output engines create demanding temperatures around the spark plugs. The 8mm yellow high-temperature silicone jacket and black Kevlar boots provide added protection against heat, vibration and abrasion while giving your engine bay a bold race-inspired appearance.

Compatible GM LS & LT Engine Families

Designed for many compatible GM LS and LT engines using the correct coil-near-plug layout and 12-inch boot-end-to-boot-end wire configuration.

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 and black Kevlar boots provide increased heat protection, but the wires should still be routed with proper clearance from headers and other extremely hot exhaust components whenever possible.