99-23 GM Truck/SUV V8 (Excl 8.1L) Hi-Perf Coil-Near-Plug Conn Kit w/9in Lead/Blk Jacket - Granatelli Motor Sports

Clean enough for a show build. Tough enough for serious horsepower. Granatelli 12-inch 0-Ohm wires give your ignition system a stealth-black connection engineered to deliver spark without unnecessary resistance.

The Granatelli 28-1629HTB 0-Ohm High-Performance Spark Plug Wire Set combines strong ignition-energy transfer with a versatile 12-inch boot-to-boot configuration, making it an excellent choice for performance engines that need additional routing flexibility around headers, brackets and custom ignition layouts.

Built with 8mm black high-temperature silicone insulation and a spiral-wound stainless-steel core, these wires are designed to handle demanding under-hood conditions while maintaining a clean, understated performance appearance.

STEALTH LOOK. FULL SPARK DELIVERY.

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

• 0-ohm conductor design for maximum available ignition-energy transfer
• 12" overall length – measured boot end to boot end
• 8mm black high-temperature silicone insulation
• Designed for continuous exposure to 500°F+ temperatures
• Stainless-steel spiral-wound core helps suppress EMI & RFI interference
• Designed for compatible GM LS & LT coil-near-plug ignition applications
• OE-style connectors for straightforward installation
• Excellent for naturally aspirated, supercharged, turbocharged and nitrous combinations
• 12-inch length provides added flexibility for custom routing
• Ideal for LS swaps, modified engine bays and performance builds
• Compatible with modern ECUs and digital tuning systems
• Pre-assembled – no cutting, trimming or crimping required
• Complete V8 set – 8 wires
• Made in the USA

Easy Bolt-On Performance: Remove your existing spark plug wires and replace them with the Granatelli 0-Ohm set. The pre-assembled construction and OE-style connectors make installation straightforward with no custom wire building, trimming or ignition conversion required.

12" Length Gives You More Routing Options

The 12-inch boot-to-boot length gives builders additional flexibility when routing around headers, brackets, relocated coils and other engine-bay components. The extra reach helps reduce tension at the terminals and makes it easier to create a clean, controlled installation on custom performance builds.

0-Ohm Performance From Coil to Plug

Your ignition coils generate the energy needed to fire the spark plugs. Granatelli's 0-Ohm conductor design is engineered to minimize resistance through the wire so the maximum available coil output reaches the plug. Strong, consistent spark delivery becomes increasingly important as RPM, cylinder pressure, boost and horsepower increase.

Built for High-Temperature Performance

Headers, turbo systems and performance exhaust components can create intense heat around the spark plugs. The 8mm black high-temperature silicone insulation is built to withstand continuous 500°F+ temperatures while resisting abrasion, vibration and deterioration in demanding street, strip and race environments.

Compatible GM LS & LT Applications

Designed for compatible GM coil-near-plug applications using the correct 12-inch boot-end-to-boot-end wire configuration. Always verify physical wire length, coil location and spark plug boot configuration before ordering.

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 protection in demanding engine bays, but proper clearance from headers and other extremely hot exhaust components is still recommended whenever possible.