Originally Posted by lacerdaschoon
Ive asked Rob from Needswings a million questions about the manifolds You only need a re-tune if you get the full replacement manifolds not the tweaked manis but im sure you would squeeze more hp out if you did get a re-tune
I would worry more about running lean with the manifolds than squeezing more power out of a tweaked tune. Before anyone takes the comment the wrong way I am not saying you will run lean just that this is my line of thinking when asked if an updated tune is needed.
So are there any issues with running lean at 120+mph if you add the mani's to the standard batch of mods?