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Alternatives Bosch spark plugs

Alternatives Bosch spark plugs - Dave D is now running NGK...

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For "normal" engines, probably up to RS2 levels of horsepower, the Bosch F5DPOR plugs have had a good track record. However, during the AAN ejecting sparkplug thread on Audifans that I started, Dave Dawson and Hap McGuire both posted that in their high hp (well over 400 whp)engines, they have had problems (expensive problems) with the F5DPOR plugs failing (tip/electrode breaking off, causing cylinder damage). They have switched to other brand plugs. Others chimed in with their alternatives:
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Unformatted text preview: Dave D. is now running NGK Iridium BKR7EIX plugs. Jonathon K switched to NGKs. BKR7Es in there at the moment but is switching to Iridium 8s (BKR8EIX) at the next change. Scott J said "I'm a huge fan of the TDC (triple copper) Bosch plugs, they are virtually indestructable IME.? When going Platinum or irridium, NGK has a better product, IMO.? IIRC, the neu S4 swapped to NGK application.?" Just posting information, not making any recommendations Some people are using DENSO K22PR-ZU 3290...
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