Champion Copper Plus 71 Spark Plug vs Denso (3297) SK20R11 Iridium Spark Plug

The Champion Copper Plus 71 Spark Plug makes for an outstanding Spark Plug at $2. The Denso (3297) SK20R11 Iridium Spark Plug, however, while overall a good product for its asking price, doesn't quite manage to stand out from its competition - there are better Spark Plugs that can be found for around $4 available here.

No sources that perform objective hands-on testing have deemed the Champion Copper Plus 71 Spark Plug worthy of being included in their Spark Plug roundups, which typically isn't a good sign.

Moving on to the Denso (3297) SK20R11 Iridium Spark Plug: no sources that perform reliable and objective hands-on testing have included it in their Spark Plug roundups, which usually means that a product doesn't make for a good purchase.

As a last step, we wanted to do a head-to-head Champion Copper Plus 71 Spark Plug vs. Denso (3297) SK20R11 Iridium Spark Plug comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.