For years, beltdriven timing drives have been the accepted standard in NASCAR Nextel Cup racing. The same holds true in the Busch Series and Truck Series as well as other top touring racing series.

Off-the-shelf parts are more readily available than ever. Custom cam profiles, crazy domed pistons, and what were once consideredwild rocker-arm ratios are now the norm in modern-day engine building.

For years, beltdriven timing drives have been the accepted standard in NASCAR Nextel Cup racing. The same holds true in the Busch Series and Truck Series as well as other top touring racing series.