H Hillshire New member Joined Sep 29, 2011 Messages 45 Nov 8, 2011 #1 How much RWHP will a 6.4 with 5in pipe, and a H&S tuner put down on a hotter tune?
RockinJW New member Joined Jul 5, 2006 Messages 574 Nov 8, 2011 #2 540-560 if it's the latest 300 tune
