Every new car sold in the United States today uses fuel injection, but not all fuel injection systems are the same. Some cars use port injection, while others use direct injection. Some even use both.

The other day I dropped my car off at a European specialist shop, and while I was there, a technician was working in the engine bay of a Mk7 Golf R, cleaning out carbon deposits off the intake valves.

In the ten years since its debut in the Corvette, the LT family has grown significantly with several variations offered across many GM platforms. The aftermarket has responded positively and is ...