NGK R6725-11.5 Racing Spark Plug c34 and are a necessity for

and are a necessity for various IFS models that have been lifted 30mm+

Z32 300zx's and R33's RB25DET'

The Atmosphere Conversion Kit includes a hose plug to block off the recirc hose

Alternatively you can run a suitable thread locking compound

NGK R6725-11.5 Racing Spark Plug c34 and are a necessity forNGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions. Fine Wire Iridium Tipped Center Electrode and Fine Wire Platinum Tipped Ground Electrode Ensures Slow Wear Rate Providing Stable Idle, Superior Anti Fouling, Improved Fuel Efficiency and Lower Emissions. Special Insulator Nose Configurations Improve Throttle Response Corrugated Ribs Prevent Flashover Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength