Author: staff@jalopnik.com (Kiran Menon)

Any engine builder will inform you how vital cylinder heads are to power and performance, so enthusiasts trying to spruce up their budget Chevy 305 small-block (SBC), or the larger and more popular 350, should find GM’s Vortec heads a worthwhile investment. People within the know often claim that these cast-iron Vortec heads from the ’90s are the best-flowing SBC head design from the factory. The argument is backed by actual flow numbers, with this Hemmings comparison showing Vortec heads improving intake flow by as much as 30 CFM (cubic feet per minute) during maximum lift. Unsurprisingly, the improved flow characteristics allow…

DiPres/Shutterstock The short and short answer as to if twin turbos hurt gas mileage is not any. As for whether or not they help with efficiency — again, the straightforward answer, mind you, is yes. As you might have imagined by now, things are pretty nuanced, with several variables at play. Put simply, the way in which you drive plays a big role – the entire process involves greater than just the gas pedal, steering, and brakes. There’s a variety of judgment, hand-eye coordination, and small calculations within the background that determine the final result of the drive itself. Identical to…

In case you think Tesla makes essentially the most efficient EV sold in america, reconsider. While the 2026 Tesla Model Y did manage a commendable 138 MPGe combined, it is the 2025 Lucid Air that topped the EPA’s list as essentially the most efficient production automobile, boasting a powerful 146 MPGe combined, leaving the updated yet fairly ugly-looking Model Y in second place and its cousin, the 2026 Tesla Model 3, in third. It’s value declaring that the Lucid Air in query is the Pure variant with rear-wheel drive and 19-inch wheels, while the EPA’s most effective Tesla was a…