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A closer look at the underside of StopTech's ST40 caliper reveals the attention to detail that set StopTech's braking systems apart from the competition. The piston-sizing/proportioning of StopTech's kits are calculated to match the manufacturers' hydraulic system. The dust boots provide protection for the seals ensuring a long maintenance free service life. The stainless steel abutments help protect the aluminum caliper body from the brake-pad's steel backing plates. 
Though the StopTech rotors may not be that much larger than their stock counterparts, they have a few added benefits that really sweeten the deal. For example, the larger StopTech rotors are slotted in order to help evacuate vaporized brake pad material and prevent build up. The rotors also feature StopTech's black “e-coating”, which is an electro-statically applied finish that prevents corrosion and rust.
A closer look at the directional vanes of the StopTech rotors. The OE Mustang rotors also have vanes, but they are not directional. Directional vanes promote greater air flow and will be a tremendous help in keeping the working temps of the brakes down. 
Before you can start installing the new StopTech goodies, you must first remove the stock dust shield in order to clear the larger brake components. Two thumbs way up to Ford for bolting the dust shield in place. It makes its removal sooooo much easier! Performance & Styling used the handy-dandy brake hose clamp you see in the background to keep the brake fluid off the ground and where it belongs.
With the dust shield removed the caliper brackets can be installed. Here we see John from Performance & Styling using a torque wrench to ensure the bracket is torqued down to StopTech's specifications. The ST40 calipers are radially mounted, which is a more direct and stiffer way to mount calipers. 
