, Tapered Spark Plug Seat Style, 14mm Thread Pitch
- Correct spark plug for GM 602, 604, and CT525 racing crate engines
- Also Works well in 4.8, 5.3, 5.7, 6.0, and 6.2 liter LS Gen III and Gen IV engines for stock and mildly modified street engines
- Features a 14mm thread and .708" reach with a 5/8" hex head
- Tip is made out of a nickel alloy material and has heat range of 5
- Core is made out of copper and projected insulator