sjmorgan 0 Posted April 29, 2007 Spark plug question: What is the difference between a Champion short plug CJ8 and a long plug J8C? When is one used over the other? My engine has a J8C. Thanks, Share this post Link to post Share on other sites
BLT 725 Posted April 29, 2007 The CJ8 was used for lower profiles. Their operating characteristics are supposed to be the same. Share this post Link to post Share on other sites