Product Description
NGK LFR7AIX Spark Plugs - Set of 16 - Hellcat / TRX / Trackhawk
Recommended Gap Size vs Boost with factory HEMI coilpacks:
- 0.029" for stock boost level
- 0.027" for 15psi
- 0.024" for 18 psi
- 0.022" for 20psi
- 0.020" for 22psi
- 0.018" for 24psi
