FAST ADJUSTABLE LSXRT ( SHORT RUNNERS)
For this test, we replaced the standard LSXR upper intake section with the larger LSXRT intake. Often referred to as the truck intake, the LSXRT top simply offers increased plenum volume on this adjustable intake application. Equipped with the short runners and FAST LSXRT top, the LS3 produced almost identical power to the standard LSXR top. The plenum volume changed the power output very little on this application. Equipped with the FAST adjustable LSXRT intake (with short runners), the 6.2L still produced
603 hp and 495 lb-ft of torque.