The reason a lot of people don't like FMIC's on Z's is (1) they believe in the stock mount locations ... and yes they work to.. but that also limits you.... if you want to go upgraded turbos a side mount will work to BUT a FMIC will allow more cooling due to the fact it has more surface area for the air to hit and cool and flow through. im a big believe of the FMIC that's the reason i went with it. A lot of people like side mounts. there is nothing wrong with them... i just am partial to a Bigger FMIC then smaller side mounts... its your choice your money your car.... If you plan on going bigger turbos id say do a fmic. if you plan on staying stock turbos id say go side mounts. but thats just ME