Originally Posted by
teamlosi906
Did you try the 9901 with the 021 header on the p5xlt??
I've never used a 9901 so I can't really say. I can say my two favorites are
9853ss great power overall.
9886 a bit more top end and smoother torque curve on a p5. Good on slipery tracks, or big tracks.
I do see lots of guys running the 9901 though....