They say pictures are worth a thousand works so here are 4000 to tell the story -









These brakes are installed on my 2005 Sierra HD but they are available for many other GM 1500 and 2500 trucks. There is a VERY noticeable improvement in braking performance (even with the 22" wheels pictures). Don't want to go that big? 20" is the minimum size that can be used! Wilwood produces 13" packages for the rear of the 1500 series trucks now and they are working on rears for the 2500s. I hear those might have the large 16" rotors to match the front when they are available.

Here is some details info for these brakes -

Forged Billet TC 6 Piston Calipers · Calipers Available in Black or Red:
Superior strength forged billet calipers resist deflection under load without adding unnecessary weight. Six stainless steel pistons generate high clamping force and balanced pad loading while resisting corrosion and reducing heat transfer from the pads. Standard kits include black calipers with the Wilwood signature. Red calipers available on custom orders.

16” Staggered Vane Directional Rotors
Staggered direction vane rotors offer the highest cooling efficiency by maximizing the surface area and air circulation between the rotor faces. SRP series rotors are drilled and slotted, and then finished in a silver zinc wash to enhance pad performance and give that high tech, corrosion resistant look inside the wheels. GT series rotors are face slotted to enhance pad performance and carry the maximum rotor mass for thermal stability in high temperature or competition applications.

Forged Aluminum Rotor Hats
High strength forged aluminum hats are rib reinforced to carry extreme loads and eliminate unnecessary, power robbing rotational weight. Black anodizing prevents oxidation while adding to the custom look inside the wheel.

Wilwood Brake Pads
Advanced formula high friction compounds have quick response, big stopping power, and extended fade resistance over OE compound pads. Low dust, low noise formulas are easy on the driver and the wheels.

Mount Brackets and Hadware
Race proven radial caliper mount system with brackets and premium grade studs, nuts, bolts, washers, and alignment shims assure an accurate and secure installation.

Plumbing
Fittings and hoses for most kits must be ordered separately. These allow you to easily connect the new calipers to your factory brake lines.

A very good upgrade if your looking for BIG brakes!