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BMW Tech and Performance
Engine Tech
After Market Spark Plugs/Non -OEM
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<blockquote data-quote="gcarch" data-source="post: 16036" data-attributes="member: 13276"><p>I recently bought OWS iridium plugs for my M52TUB20 engine. Plug gap set at 0.8mm.I was previously using OEM NGK plugs. Tried Bosch as specified in by BMW too, but felt that NGK's give better performance until I changed to iridiums. I've read about expensive after market plugs not giving any real performance gains but my switch to iridiums changed my perception of them. Engine revs freely, exhaust note sounds different at higher rpms, laggy feeling around 1000-2500rpm has been eradicated, better pick up from standing start now, I'd say that 0-100kph times have improved too.</p></blockquote><p></p>
[QUOTE="gcarch, post: 16036, member: 13276"] I recently bought OWS iridium plugs for my M52TUB20 engine. Plug gap set at 0.8mm.I was previously using OEM NGK plugs. Tried Bosch as specified in by BMW too, but felt that NGK's give better performance until I changed to iridiums. I've read about expensive after market plugs not giving any real performance gains but my switch to iridiums changed my perception of them. Engine revs freely, exhaust note sounds different at higher rpms, laggy feeling around 1000-2500rpm has been eradicated, better pick up from standing start now, I'd say that 0-100kph times have improved too. [/QUOTE]
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