No, I'm not thinking of all those producers of lithium ion batteries. As the Tea Party gains influence, battery makers should ask themselves whether Congress will have the stomach for additional EV subsidies.
Instead, I'm thinking of gasoline direct injection, stop-start systems, advanced transmissions, variable valve technology and turbochargers.
J.D. Power and Associates and IHS Automotive both showed me their five-year forecasts for these technologies. While they differ a bit on the details, they agree on the trend.
Gasoline direct injection will be used in 38 percent of all light vehicles produced in North America in 2016, up from 9 percent this year, predicts IHS Automotive. J.D. Power expects a 25 percent market share in 2015.
Nearly 90 percent of vehicles produced in North America will feature variable valve technology by 2016, up from 71 percent this year, according to IHS.
And turbochargers will grow to either 12 percent of the market (IHS) or 25 percent (J.D. Power), up from 1 or 2 percent today.
Gearbox suppliers like ZF and Aisin should expect lots of orders. Meanwhile, turbocharger producers such as BorgWarner, Honeywell and Mitsubishi Heavy Industries will have a slugfest for market share.
And keep your eye on Bosch and Continental, which offer gasoline direct injection.
Here's the bottom line: Despite all that loose talk about EVs and plug-ins, the real game is kaizen -- steady, incremental improvements in gasoline-powered vehicles.
That's where the money is.