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M157 V8 spark plugs

stock car - OEM are your best bet

non stock - check with the tuner / MSL for guidance
 
stock car - OEM are your best bet

non stock - check with the tuner / MSL for guidance
OEM are OK for a Stage1 MSL remap, one step colder for Stage 2/downpipes.
It's also advised to change the plugs every 2 years in a remapped car.
 

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