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.
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
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