The Montego Blue Mazda's owner began with a 388-cubic-inch LS and added custom cylinder heads and a Borg-Warner model 491 turbocharger that can be seen through the center opening in the front air dam.

but with the new General Motors LS1 engines, a change was made to instead make them out of aluminum, which was also used for the cylinder heads. By doing this, GM was able to drastically reduce ...