i got bored tonight and decided to go a little further on my intake porting i noticed that the primary ports on the LIM were an 1/8th inch larger than the UIM that seated against it. I found that to be pretty gay so i took care of the problem if you look close to the right side primary you can see it's slightly larger than the left if you are porting chech the port size differences between the LIM and the UIM with a tape measure you'll see what i mean