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For this car, NGK specify a resistor plug - BPR6ES. I have found zero performance difference (ie: starting, idling, accelerating, fuel economy...)between resistor and non-resistor plugs in these engines. In my experience the NGK's seem to stay "sharper" longer than the Bosch Super plug. You may or may not find a bit of radio/stereo noise with the non-resistor plug. If you want to try a platinum plug, NGK's item is the BPR6EVX. A number of posters here have been critical of the Bosch platinum plugs.
Go to: www.ngksparkplugs.com/apps/default.asp?nav=60000&country=US to check out the NGK plugs for your (or any) engine.
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Bob (81-244GL B21F, 83-244DL B23F, 94-944 B230FD)
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