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

Get the extra routing length your LS or LT needs while replacing the resistance found in conventional spark plug wires. Granatelli 12-inch red 0-Ohm performance wires are built to provide a more direct electrical path from the ignition coil to the spark plug.

The Granatelli 28-1629S-R 0-Ohm High-Performance Spark Plug Wire Set is engineered for compatible GM LS & LT coil-near-plug ignition systems. Its 12-inch boot-to-boot length provides additional routing flexibility for applications where shorter wires may not provide enough reach.

The 28-1629S-R provides standard/base heat protection comparable to an OEM-style spark plug wire. Its primary performance advantage is Granatelli's 0-Ohm conductor technology, which minimizes electrical resistance and helps deliver more of the ignition coil's available energy to the spark plug.

MORE REACH. ZERO-OHM PERFORMANCE.

GUARANTEED 5–10 HP GAIN

Granatelli 0-Ohm wires are designed to reduce electrical resistance so more of the ignition coil's available energy reaches the spark plug. Naturally aspirated applications can see measurable horsepower gains, while boosted or nitrous combinations may benefit even more.

Key Features

• True 0-Ohm performance construction for minimal electrical resistance
• 12" overall length – measured boot end to boot end
• Red 8mm performance ignition wire
• Standard/base heat protection comparable to OEM-style spark plug wires
• Designed for applications that do not require extreme high-temperature wire protection
• Helps transfer more available ignition energy from the coil to the spark plug
• Designed for compatible GM LS & LT coil-near-plug ignition systems
• 12-inch configuration provides additional routing flexibility
• Excellent for applications requiring more reach than shorter 8" or 10" wire sets
• Patented EMI & RFI suppression technology
• OBD-II computer safe
• Compatible with modern fuel-injection and electronic engine-management systems
• Suitable for naturally aspirated, supercharged, turbocharged and nitrous applications
• Pre-assembled – no cutting, trimming or crimping required
• Complete V8 set – 8 spark plug wires
• Made in the USA

Standard Heat Protection: The 28-1629S-R provides base heat protection similar to an OEM-style spark plug wire. This is not Granatelli's upgraded high-temperature or Kevlar-boot version. If the wires will be positioned extremely close to headers or other intense heat sources, choose one of Granatelli's dedicated high-temperature wire sets instead.

The Real Upgrade: 0-Ohm Performance

The main advantage of the 28-1629S-R is its 0-Ohm conductor design. Conventional spark plug wires use electrical resistance that consumes part of the energy generated by the ignition coil before it reaches the spark plug. Granatelli's 0-Ohm technology minimizes that resistance so more of the coil's available energy can reach the plug.

More Available Energy From Coil to Plug

Spark plug wires do not create ignition energy—the ignition coil does. A performance wire improves the electrical path between the coil and plug. By reducing resistance, Granatelli's 0-Ohm design helps minimize energy loss and provides a more direct connection to the spark plug.

12" Length for Flexible Coil-to-Plug Routing

The 12-inch boot-to-boot configuration provides added reach for applications where the ignition coils are positioned farther from the spark plugs or where the engine-bay layout requires a longer routing path. This makes it easier to maintain a clean installation without putting unnecessary tension on the wire or terminals.

Built for Modern Electronic Ignition Systems

Granatelli's patented suppression technology helps control EMI and RFI interference, allowing the low-resistance design to work with modern ECUs, fuel-injection systems, sensors and digital ignition equipment without introducing unwanted electrical noise.

Ideal for Street & Performance Applications

For vehicles with normal spark plug wire routing and adequate clearance from exhaust heat, the 28-1629S-R provides the protection expected from a standard performance wire while adding the primary benefit of Granatelli's 0-Ohm ignition technology.

Compatible GM LS & LT Applications

Designed for compatible GM coil-near-plug ignition systems using the correct 12-inch boot-to-boot wire configuration. Common LS-family applications include:

Common Engine Sizes

Important Fitment Notice: Part #28-1629S-R uses 12-inch wires measured boot end to boot end. Engine family or displacement alone does not guarantee physical fitment. Compare your existing wire length, ignition coil position, spark plug boot configuration, connector style and routing before ordering.

Heat Notice: This wire provides standard/base heat protection comparable to OEM-style spark plug wires. It is not intended to replace Granatelli's dedicated high-temperature or Kevlar-protected wire sets when the wire or boot must operate extremely close to headers or other intense heat sources.