Optimized for the performance enthusiast, the NGK LTR7IX-11 (Stock No. 6510) is the go-to ignition upgrade for high-performance GM LT-series engines. These plugs are engineered to provide a more stable spark and superior durability under the extreme conditions found in modern high-tech engines.
0.6mm Fine-Wire Iridium Tip: The ultra-fine center electrode reduces the voltage requirement for a spark, resulting in faster starts, smoother idling, and improved throttle response.
High-Temp Resistance: Iridium alloy has an extremely high melting point, ensuring consistent performance in high-compression or forced-induction environments.
Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties, protecting your cylinder heads and making future plug changes easier.
Flashover Protection: Corrugated ribs prevent electrical leakage (flashover), ensuring the spark occurs only at the electrode tip.
Maximum Heat Dissipation: A pure alumina silicate ceramic insulator and a solid copper core work together to pull heat away from the combustion chamber quickly.
Gas-Tight Seal: Specialized triple seals prevent combustion gas leakage, maintaining engine compression and peak power.
| Attribute | Specification |
| Part Number | LTR7IX-11 (6510) |
| Fitment | Gen V LT Engines (LT1, LT4, LT5, L83, L86, L8T) |
| Heat Range | 7 (One step colder than most stock LT1/LT4 applications) |
| Thread Size / Reach | 14mm / 25mm (1.0") |
| Seat Type | Tapered |
| Preset Gap | 1.1mm (0.044") |
| Hex Size | 5/8" (16mm) |
Tech Note: While these plugs come pre-gapped at .044", always verify the gap for your specific build requirements, especially in forced induction or nitrous applications.
