Indy's Ken Lazari says, "It is not much over about a $2,000 upgrade to any engine, so it's not out of this world as far as extra cost, and that's why we build a lot of them. These things are noseheavy ...

Normally, when issues like damage and high mileage make replacing the cylinder heads on a 6.6L Duramax diesel engine necessary, most people use rebuilt stock heads. This has been the standard practice ...