Originally Posted by mjgroves
Also, I have a LET tune for the C3 pulley and NW dual, would I need to be retuned if I purchased these tweaked manis?
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