Well, we can credit craigslist with teaching me about a racing series I never knew existed. This 1968 BMW 2002 found here on craigslist for $12,750 is said to have raced in the IMSA RS Challenge, later known as the Champion Spark Plug Challenge. The goal: limit modifications to suspension adjustments of no more than one inch and pack the field full of subcompact sedans. It began in the early 70s and cars like this 2002 were common entries due to IMSA’s goal of stoking interest in the sport by featuring cars seen every day on American roads. Combined with the emphasis on racing cheaply and keeping maintenance costs to a minimum, it’s easy to see that the Spec Miata series wasn’t necessarily an original idea! Does anyone remember cars like this 2002 going wheel-to-wheel with other subcompacts in the 70s?