I think Gaz makes their coilovers on order anyway. So they can probably make a set for a standard Sierra as well. The fronts of 2wd Cosworth are about an inch shorter than standard 2wd shocks, but other than that the fitment is the same. At the rear the bottom mount is different on the Cosworth vs. a standard Sierra. The Cosworth uses an M12 bolt and a narrower mount than the standard Sierra which has an M10 bolt. But the lower mount on a standard Sierra is less strong than the mount on the Cosworth arm. I wouldn't know if I would trust the standard mount enough for using coilovers.