Spark Plugs

We ran a new set of E3's at the San Antonio race a few weeks back & they slowed the car down .2, we put the used Autolites back in & got the .2 back. We checked the plugs lengths & the E3's were 3/16" shorter than the suggested Autolites. The E3's were also hard to read. E3's are a gimmick like the Splitfires & the U groove plugs. Check out what Slantsix Dan had to say about them. JMO