FAST ADJUSTABLE LSXR (SHORT RUNNERS)
Equipped with the short runners in the Fast LSXR intake, the LS3 really wanted to rev. This combination produced peak power at 7,000 rpm and was the first intake we tested to eclipse the 600hp mark. Though the peak output shined, the short runners once again traded torque production lower in the rev range. This intake combination needed increased displacement and/or wilder cam timing to take advantage of what it had to offer. Equipped with the FAST adjustable LSXR intake (short runners), the 6.2L produced
603 hp and 496 lb-ft of torque.