Spark Plugs, M156 , M159

For those who will be making over 630bhp these uniquely designed spark plugs are a must have.  The extended electrode tip of the OEM spark plug will be prone to pre-ignition at higher power and boost levels.  Upgraded spark plugs are a must have with our Stage 2 and 3 Supercharger packages. 
Key Features:
Higher Output for Supercharged applications
Colder range for better compatibility in supercharged applications
Direct replacement/bolt in for M156/M159
Inexpensive way to gain power and efficiency
Increased overall safety of engine parts
Set of 8
* Important: Please be sure to check and set spark plug gap prior to installation.