The Ultra Lo-Ram was tested on a Gen 3 Coyote at Westech not too long ago. This cammed engine made 595.4hp and this manifold wants to continue to make power above 8,100 rpm! Both the Hi-Ram and Ultra Lo-Ram have the same runner lengths at 9.20-inch. Our Hi-Ram is about 6mm taller at peak, but has more plenum volume and is designed to be used with a stackable intercooler. Another key note is that you can buy the round and oval front inlets for the Ultra-Lo Ram separately, so if you wanted to upgr