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Re: Upgrading from NGK BPR9ES from BPR6ES.
I'd run the hottest plug you can run without your car blowing the spark out or cutting out under boost, for the aforementioned reasons.
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Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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