It`s not a back-to-back test but, I just ran my best 1/8th mile.....1.36 60ft 6.264 et @ 108.35 mph w/a victor 4150/adapter and my last best was....1.41 60ft 6.386 et @ 107.12 w/an M-1 dom flange intake w/a 1" spacer and that was in May of 05 so,....