Originally Posted by
sarujo
^^ Booter - there are reasons behind this design, and it's actually superior to the wishbone style RMM's many of us are running. I'm running the 75A Stage 1 CPE RMM and after going through many installs/reinstalls and RMA with CPE, if I had to do it again, I would go JBR or CPE Stage 2 - sadly Stage 2 only fits the Speeds right now. Here is the direct info from CP-e:
The way the Mazda engine mount system works is that the two side mounts provide a rotational mounting point, if just these two mounts are installed without a lower engine mount the bottom of the engine is free to swing like a pendulum. Now if you take the stock engine mount and put it in place with its horizontally mounted bushing and you apply some power, it will stop the engine from swinging but you are now stressing the bushing in two directions. These types of bushing are not really meant for this.
So cp-e™ came up with a way to stress the bushing in only one direction, by remaking both sides of the engine mount cp-e™ was able to mount the bushing vertically so now the pendulum affect of the engine is stretching or pushing in only one direction. This also increases the durability of the engine mount substantially.