12 Inch Extreme Race Spark Plug Wires for LS Engines
If your LS swap demands unwavering ignition under track stress, the Extreme Race Wires 12 Inch set maintains a precise 25 ohm per foot resistance to prevent timing glitches and misfires. Featuring an 8 mm conductor wrapped in a silicone jacket rated for 600 F, it holds up against heat soak and chemical exposure without hardening over repeated cycles. Integrated RFI suppression keeps sensors clear of electrical noise while molded 45 degree boots align perfectly with GM LS plug wells for straightforward routing around exhaust headers. This combination of conductor precision and durable shielding delivers a true plug and play fit for tight LS engine bays.
Precision Conductor Dimensions for Reliable LS Spark Delivery
The Extreme Race Wires feature an 8 mm conductor engineered to hold resistance at just 25 ohms per foot, ensuring minimal voltage drop and consistent spark energy to each cylinder. This precise diameter supports a sharper throttle response and more uniform combustion under high engine loads, which is critical when pushing an LS swap to its limits. The conductor's balanced mix of stiffness and flexibility also streamlines routing in tight engine bays, preventing kinks that can degrade performance over time. In track and street applications alike, this attention to conductor design translates into dependable ignition with every revolution.
Integrated RFI Shielding for Stable Engine Control Signals
Each wire incorporates an internal resistive core surrounded by a dedicated shield to block radio frequency interference that can corrupt ECU and sensor readings. By containing electromagnetic noise generated during rapid coil switching or alternator spikes, the design preserves clean signal paths for precise ignition timing. This protection becomes especially important in high output LS setups where electrical noise peaks during hard acceleration. The result is consistent spark timing and reduced misfire risk, even under the most demanding driving conditions.
600 Degree Silicone Insulation for Heat and Chemical Resistance
A robust silicone oversleeve rated to withstand 600 degrees Fahrenheit shields the core from heat soak emanating from headers and exhaust manifolds. Unlike conventional materials that may harden, crack, or shrink over repeated cycles, this formulation remains pliable and maintains full dielectric strength. Its innate resistance to oil, ozone, and common under-hood chemicals prevents long-term degradation, while the smooth outer layer resists abrasion against mounting brackets and frame members. This durable barrier ensures continuous performance, lap after lap, mile after mile.
Molded 45 Degree Boot Design for Exact LS Plug Alignment
The precision molded boots feature a 45 degree profile that aligns naturally with GM LS plug wells and coil pack towers, forming a tight seal against contaminants. By reducing bending stress at the plug interface, this geometry minimizes pull-off and premature wear during hard launches or spirited cornering. The contoured shape also guides wires around header tubes without forcing sharp bends, cutting installation time and eliminating routing guesswork. From the first start, the design delivers a secure fit and solid spark connection for every cylinder.
Count on consistent ignition every time. For those looking for the same wires but need shorter wires because these are too long see our Extreme Race Wires 8 Inch.