NGK TR6 (Stock No. 4177)
is a popular performance spark plug primarily used in GM LS-series V8 engines and various Ford modular V8 engines. It is a "one-step colder" copper plug often chosen by enthusiasts for modified, cammed, or lightly boosted vehicles.
Common Vehicles & Engines
The TR6 is most frequently used in:
• GM LS Engines:
• Chevrolet Corvette (C5, C6 models with LS1, LS2, LS3)
• Chevrolet Silverado/GMC Sierra (V8 models)
• Holden Commodore / HSV (LS1, LS2, LS3, L98, L77)
• Ford V8 Engines:
• Ford Mustang GT
& Shelby GT500 (Modular 4.6L and 5.4L/5.8L engines)
• Ford F-150 & F-250 (5.4L Triton V8)
• Mercury Marauder and Ford Crown Victoria
Performance Applications
• Modifications: Ideal for "cammed" engines where a slightly colder heat range prevents pre-ignition.
• Forced Induction: Often used in supercharged applications (like the Shelby GT500) running under 15 psi of boost.
• Tuning: Tuners frequently recommend the TR6 for vehicles that have had an ECU "remap" or "tune" for extra power.
NGK TR6 x 8 for GM LS-series V8 and Ford modular V8 engines.
Type: Spark Plug
Manufacturer Part Number:4777
NGK TR6 (Stock No. 4177)
is a popular performance spark plug primarily used in GM LS-series V8 engines and various Ford modular V8 engines. It is a "one-step colder" copper plug often chosen by enthusiasts for modified, cammed, or lightly boosted vehicles.
Common Vehicles & Engines
The TR6 is most frequently used in:
Brand: NGK
Voltage: 4 V
