12 Inch Extreme Race Spark Plug Wires for LS Engines
Whether you're tackling a track day or a spirited street build, the Extreme Race Wires 12 Inch deliver consistent spark even under LS header heat. With an 8 mm conductor held at 25 ohm per foot, these wires prevent timing drift while the silicone sleeve resists temperatures up to 600 F and common fluids. They also include internal RFI suppression to keep your ECU free of noise and molded 45 degree boots that match GM LS plug wells for accurate routing. This combination ensures the ignition path stays intact for precise engine swaps.
Precision 8mm Conductor for Consistent Spark Energy
The Extreme Race Wires 12 Inch feature an 8mm conductor that maintains 25 ohm per foot resistance, ensuring each cylinder receives uniform voltage under load. This precise thickness helps limit voltage drop, promoting stronger spark delivery and sharper throttle response when the engine is pushed near its limit. A balanced mix of stiffness and flexibility also simplifies routing through tight LS engine bays, preventing kinks that can hamper performance over time. The result is a reliable ignition path that stands up to track day demands and spirited street use.
Advanced RFI Suppression for Clean Ignition Signals
Internal suppression shielding in these wires isolates electromagnetic noise generated by rapid coil discharge or alternator spikes, keeping ECU and sensor signals free of interference. This design is crucial in high output LS swaps, where noise can distort timing data and lead to erratic performance. By containing radio frequency energy within the conductor assembly, the system preserves precise ignition timing and reduces the likelihood of misfires. Drivers benefit from stable engine control even during aggressive acceleration or high current draw events.
600°F Silicone Insulation for Enduring Heat Protection
A premium silicone jacket rated to 600°F shields the core from heat soak near headers and exhaust manifolds, preventing material hardening or shrinkage that can lead to cracks. Its natural resistance to oil, ozone and common under hood chemicals extends service life when compared to standard coverings. The smooth outer surface also resists abrasion against mounting surfaces or frame components. This robust barrier ensures the wires retain full dielectric strength, lap after lap.
45 Degree Boot Form for Accurate LS Plug Placement
Molded boots at a 45 degree angle match the geometry of GM LS plug wells and coil towers, creating a secure seal against contaminants while reducing pull off stress. This alignment minimizes bending loads at the spark plug interface, extending component life under repeated vibration or hard launches. The shape also guides wires around header tubes without forcing sharp bends, streamlining installation and preserving wire integrity. From initial fit to long term operation, the design delivers a precise and enduring connection for each cylinder.
Trust each set for consistent spark delivery. For those looking for the same wires but need shorter wires because these are too long, consider our Extreme Race Wires 8 Inch.