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NGK 5464 BKR5EIX-11 Iridium IX Spark Plug vs AC Delco Professional RAPIDFIRE
NGK 5464 BKR5EIX-11 Iridium IX Spark Plug
AC Delco Professional RAPIDFIRE
The NGK 5464 BKR5EIX-11 Iridium IX Spark Plug and AC Delco Professional RAPIDFIRE make for good, if unremarkable, Spark Plugs at their respective budgets.
With that said, while they both should serve reasonably well, you might want to look into other options at the $17 and $5 price points - it's likely that there are some better alternatives available.
If you want to learn more about the NGK 5464 BKR5EIX-11 Iridium IX Spark Plug and the AC Delco Professional RAPIDFIRE, however, we prepared a summary of the information that we have:
The NGK 5464 BKR5EIX-11 Iridium IX Spark Plug hasn't managed to get enough recognition from sources that do high-quality hands-on testing and therefore didn't make it into any relevant roundups. That, by itself, makes it difficult to recommend.
As for the AC Delco Professional RAPIDFIRE - it wasn't considered to be a good enough purchase to earn a spot in any roundups conducted by sources that perform objective hands-on testing, which typically indicates that a product isn't worth its asking price.
As a last step, we wanted to do a head-to-head NGK 5464 BKR5EIX-11 Iridium IX Spark Plug vs. AC Delco Professional RAPIDFIRE comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.