Originally Posted by
toyoter91
Every single legend 4 I have seen does 10 min pits. Most, if not all, of them were running just what comes installed in it out of the box.
9901 pipe with 41021 header
2058 pipe combos
some other pipe combo as well.
6mm insert, Byrons worlds 30/8, dynamite mid pipe with 41001 manifold, Mugen clutch with 1 mm springs and the legend 4 does ten plus minutes. I adjust my throttle dual rate down til I notice a decline in performance and tweak it from there.
I want to try a 7mm insert to get more power and see how much run time is reduced.