At Atco Raceway, the headers showed substantial gains—nearly 4-tenths and over 4 mph. Matt changed the tune on the torque management from 60-percent to nearly 100-percent throttle opening during the holeshot launch for better 60-foot times. With that, he changed to a set of 305/35R-18 drag radials mounted on C6 wheels (seen in pic) in place of the stock 285/35R-20s. The drag radials cut nearly 2-tenths from the 60-foot and 3-tenths in the quarter mile bringing the best E.T. down to an 11.47 at 119.32 mph.