is it a must i remove the rear steer on an fc to get maximum performance for drifting? (im not sure if fd's even have them)

 

Regardless, for maximum performance you would want to install all new upgraded suspension mounts and bushings anyway, which would include the toe steer eliminators. The toe steer eliminators are only about $70-200 total for the parts, which is a drop in the bucket compared to the rest of the money you will spend on a maximum performance drift setup. You can perform the labor when replacing all the other mounts, bushings, shocks, springs, and sway bars. If you don't have a bearing press and experience removing old troublesome bushings, then you should have your local performance shop install them.

Only the FC has toe steer suspension.

You can browse suspension parts at these websites:
http://www.racingbeat.com/
http://www.mazdatrix.com/
http://store.awrracing.com
http://www.corksport.com/

You can get a discount on racing parts if you join Mazdaspeed Motorsports Development.
http://www.mazdamotorsports.com/wcss...ershipinfo.htm

 

You should remove it. I still have mines and it felt weird when I first felt it. It feels like your prediction gets throw off if you don't know about it. Like, you'll think your car will understeer a bit and then it actually takes it? You know what i mean? It's an inexpensive mod, go for it. It's about 50 bucks for the Racing beat one.