Always New... Never Rebuilt A Genuine Darryl's engine is never rebuilt, nor are any of the internal components rebuilt, reground, resurfaced, or reconditioned in any way. We sell only hand-built, new, zero-mile turnkey replacement engines for air-cooled VW vehicles . And, Darryl's never adds any core charges, because we don't have any use for used parts. So, while air-cooled engines are the core of our business, we are not in the core business.