This should answer yesterday's Pop Quiz question...

 The culprit was this '06 GMC Sierra 2500 packing a built LBZ, a 72mm charger, plenty of fuel, and a built Allison. As may be evident here, the truck is capable of planting 680 hp and 1,300 lb-ft to the pavement. It's run 7.50's in the eighth-mile and terrorized the local Work Stock sled pulling circuit all season, taking First Place in points.

 Some reputable names, such as Illini Outlaw Diesel, Duramax Tuner, and Danville Performance, helped this truck get where it is today. Stay tuned for a full feature in the magazine in the months ahead to find out which part each company contributed on this dominant Duramax.