Editor's Note: Way back in March of 1998, GMHTP ran "Opti-Spark" by Ray Bohacz, an engineering-level dissection of GM's Opti-Spark distributor. This evolutionary ignition component was a bridge ...

Part 2: We take a good look inside the C7's all-new engine, with help from the people who know it best In our April 2013 issue, we went one-on-one with the GM powertrain teams responsible for the new ...