For a supercharged Duramax build, the brake system has to do more than look the part. It has to manage vehicle weight, heat, wear, and corrosion with repeatable performance. That is why we’re using Wilwood’s TX6R brake system on our ’66 Chevy C20, along with their forged aluminum master cylinder and 10:1 swing mount brake pedal. What matters here is how the parts are made. Wilwood starts key components like calipers, hats, and hubs from net forgings, then machines multiple finished variants from those blanks. That keeps strength where it belongs and cuts waste compared to carving everything from billet. On the calipers, hard anodizing is used for better wear and corrosion resistance, especially in the piston bores. On the rotors, e-coating gets into the internal vanes and holds up better for corrosion protection than zinc once temperatures climb. Just as important, the brake system is tested and bedded correctly. Burnishing pads to rotors on a brake dyno matches the surfaces before serious use, which is exactly what you want when the truck is being built to run hard. The result is a brake package backed by real manufacturing control, real process discipline, and the kind of durability a heavy truck actually needs.
Gale Banks visits Wilwood to show not just what the company makes, but how it manufactures brake components in-house. The tour moves through testing, research and development, machining, quality control, finishing, and final assembly, with an emphasis on the engineering culture behind the products. Throughout the visit, the discussion highlights similarities between Wilwood's manufacturing approach and Banks' own in-house development philosophy: engineers design parts, create tooling, validate production, and keep as much of the process under direct control as possible.
The tour begins in Wilwood's dyno area with an older brake dynamometer built by Bill Wood roughly 30 years ago. Although it is no longer used as heavily for data collection, it still serves an important role in burnishing brake pads and rotors together. In racing and other controlled test applications, Wilwood beds the pads to the rotors before they ever reach the vehicle. The goal is to deliver a brake system that is already matched and stabilized, much like a race engine that has already been dyno-tested before arriving at the track.
This older dyno uses a large flywheel to simulate vehicle inertia, originally based around a stock-car-type application in the 3,200- to 3,500-pound range. It is powered by a natural-gas-fueled Chevrolet Goodwrench 350 and, being in California, even requires emissions testing. When operating, it is loud and unmistakably mechanical, but it remains useful for the specific task of saturating and conditioning brake pads so they are ready to run without requiring on-road bedding.
Wilwood's current state-of-the-art brake dyno is a LINK system used for the company's primary testing work. Unlike the older engine-driven setup, this dyno is electrically driven and can simulate a wide range of vehicle masses. It uses two motors, which can be run individually or together, along with modular inertia plates that are bolted together to represent different vehicle weights.
That flexibility allows Wilwood to test brake systems for applications ranging from a 2,000-pound car up to a 30,000-pound vehicle. The upper end includes OEM and military platforms, and even trailer brake systems for military use. The dyno is quiet enough that a normal conversation can take place beside it while it operates, a stark contrast to the older machine. In use, the brake rotor mounts on the back side of the fixture and the caliper mounts to the front bracket, allowing the system to reproduce real braking loads in a controlled environment.
The tour also passes through Wilwood's research and development area, where there is no production work, only testing and development. Bill Wood's enthusiasm for Miatas is evident here. At the time of filming, he reportedly owns four of them: two race cars and two street cars. One of the street cars has been fitted with a 3.7-liter Chevrolet V6, while one of the race cars is used in ChampCar-style endurance competition. A second race car serves as a backup, though both may run on the same weekend.
These vehicles are more than hobby projects. They function as rolling test beds for telemetry gathering and brake development, including ABS-related testing. The area reflects Wilwood's broader engineering method: prototype, instrument, test, revise, and keep development close to the people designing the hardware.
A major part of Wilwood's process is that it makes its own tooling. If an engineer designs a new caliper, that same engineering effort extends into designing the tooling needed to manufacture it. This reduces interruptions between design and production and helps ensure that when a part reaches the larger machine shop, the process is already thought through and validated.
Quality control is handled with a CMM machine that measures both in-house manufactured parts and incoming raw or finished goods, including items such as brake pads. The purpose is straightforward: verify that every component meets specification before it moves further into production or assembly. This combination of in-house tooling and metrology supports repeatability and shortens the path from concept to production-ready hardware.
Much of Wilwood's caliper, master cylinder, and rotor-related manufacturing happens on the machining centers shown during the tour. For calipers, the company starts with a near-net forging rather than machining entirely from billet. The raw forged aluminum part is then machined, deburred, and later sent for hard anodizing. According to Wilwood, roughly 40 percent of the forging's mass is removed during machining, but the forging route still offers advantages in strength and material efficiency compared with billet.
The same philosophy appears in rotor and hub components. One race rotor shown uses directional vanes, but the casting is designed with a flange on both sides so the same casting can be machined into either a left-hand or right-hand rotor by removing the appropriate flange. That reduces the number of unique castings required.
Wilwood also uses forging blanks as universal starting points for multiple hat designs. One example shown accommodates a 12-on-8.75-inch bolt pattern, after which different rotor hats can be machined from the same forging. The result is a family of parts produced from one common blank, lowering waste and cost while retaining the strength benefits of forging. The same strategy is used for hub assemblies. A large near-net forging with a substantial flange, snout length, and offset gives enough material to machine many variants. Modern machines now complete what used to require four or five operations across multiple machines in just two operations on one machine, including both turning and milling work as well as thread cutting.
Wilwood brought hard anodizing in-house after seeing outside lead times increase and quality decline. By controlling the process internally, the company says it can better monitor consistency and deliver a higher-quality finished part. An additional benefit is that street customers now receive the same finish and process used on Wilwood's race components, rather than a lower-tier cosmetic treatment.
The discussion specifically contrasts hard anodizing with conventional Type II anodizing. Wilwood uses hard anodizing, or Type III, because it provides better durability, corrosion resistance, and wear characteristics. That matters in brake calipers because pistons move within bores, and the surface finish must resist wear while maintaining dimensional control. The anodizing thickness is accounted for in the machining process so the final bore dimensions remain correct after coating.
The process sequence shown includes alkaline cleaning, water rinse, acid etch, another rinse, sulfuric anodizing, and additional rinse stages. One tank is labeled for Type III sulfuric anodizing at an operating temperature of 28 to 32 degrees Fahrenheit, with sulfuric acid concentration listed at 12 to 15 percent, deionized water making up the balance, and dissolved aluminum kept below 15 grams per liter. The fixtures used to hold the aluminum calipers are made from titanium, including the plates, nuts, bolts, and washers, because the fixturing must be non-ferrous and compatible with the bath conditions.
The finished hard-anodized calipers emerge in a neutral gray color without dye. That gray appearance is simply the natural result of the process rather than an added pigment.
For the rotors used on the truck project, Wilwood applies an e-coat finish rather than zinc coating. The reason is thermal durability and corrosion protection. Zinc-coated rotors can lose effectiveness when temperatures rise high enough for the zinc layer to chalk and stop functioning as a corrosion inhibitor. E-coat, by contrast, is a water-based paint process similar to the black coating commonly seen on aftermarket replacement body panels.
Wilwood prefers e-coat because it reaches deep into the rotor's internal vanes and provides better long-term rust resistance. During the process, the part is submerged in the e-coat tank, manipulated to release trapped air, and electrically charged so the coating deposits evenly. On the finished rotor, the braking annulus where the pad contacts the rotor is left clear through use, while the rest of the rotor retains the protective coating.
The final stop is the assembly area, where components are assembled, packaged, and prepared for shipping. This is where the finished Wilwood kits are put together before going into the box. Branding is still applied in a surprisingly manual way: a silk-screen press prints the Wilwood logo onto calipers two at a time, much like an old-school T-shirt process. After printing, the calipers are baked again to cure the marking.
Wilwood also uses laser engraving for some newer marking work, but the silk-screen process remains part of the production flow. The completed caliper shown at the end of the tour is the model intended for the truck project, tying the factory visit back to the parts that will appear in the build.