Sold as a set of 6 Spark Plugs:

For years we searched for the "right" plug for high HP, high boost applications on our own Zs. After testing numerous spark plugs we found the absolute best plug money can buy. Trying to find an adequate plug colder than the PFR6B-11B proved to be tough, but these plugs deliver the best spark around. BKR6, 7, 8 and 9.

Heat Ranges Available:

• The "7" heat range is an excellent all around plug. Work great for direct stock replacement applications and modified vehicles. Great for anything under 20 psi. Works great on non-turbos. Great in cold weather applications.

All plugs come pre-gapped anywhere from .028' to .032", no gapping required! Simply double check the gap and your ready to go!