WIL120-13843-BK
The Forged Dynalite Internal 4-Piston Lug Mount Brake Caliper is the next-generation evolution of Wilwood’s proven Dynalite design. Manufactured by Wilwood, this caliper combines a forged aluminum body, four stainless steel pistons, and a spacerless single-bridge construction to increase stiffness, reduce deflection, and deliver more consistent braking performance.
Designed around a universal 5.25" lug-mount configuration, the Forged Dynalite Internal works with rotors measuring 10.00" to 13.06" in diameter and 0.25" to 0.38" in width. Internal fluid passages and a single 1/8"-27 NPT inlet provide a clean installation, while compatibility with Wilwood Dynalite Type 7112 brake pads makes this caliper a strong choice for off-road racing, road racing, autocross, and performance street applications.
| Specification | Details |
|---|---|
| Manufacturer | Wilwood |
| Caliper Series | Forged Dynalite Internal |
| Mount Type | Lug Mount |
| Mount Side | Universal |
| Mount Center Spacing | 5.25" |
| Mount Hole Size | 0.39" |
| Mount Height | 2.03" |
| Inlet Thread Size | 1/8-27 NPT |
| Piston Count | 4 |
| Piston Bore | 1.75" Each |
| Total Piston Area | 4.80 in² |
| Piston Material | Stainless Steel |
| Dust Boots | No |
| Caliper Body Material | Forged Aluminum |
| Caliper Weight | 3.6 lbs |
| Rotor Diameter Range | 10.00"–13.06" |
| Rotor Width Range | 0.25"–0.38" |
| Brake Pad Type | Wilwood Dynalite Type 7112 |
| Total Pad Area | 6.36 in² |
| Total Pad Volume | 2.1 in³ |
| Finish | Type III Anodized |
| Fitment Requirement | Compatibility |
|---|---|
| Mounting Configuration | 5.25" Lug Mount |
| Rotor Diameter | 10.00"–13.06" |
| Rotor Width | 0.25"–0.38" |
| Brake Pad | Wilwood Dynalite Type 7112 |
| Brake Line Connection | 1/8-27 NPT |
The Forged Dynalite Internal uses a spacerless body and single split bridge to increase structural stiffness and reduce caliper deflection. The internal fluid passages also eliminate the external crossover tube used on many conventional caliper designs.
Forging helps preserve a continuous grain structure through the caliper body. Combined with Wilwood’s engineered radial transitions, this provides increased strength and stiffness while keeping caliper weight low.
A stiffer caliper flexes less as hydraulic pressure increases. Reduced deflection directs more pedal force into clamping the rotor, supporting firmer pedal feel, more predictable modulation, and consistent pad contact.
This caliper is suited for off-road racing, road racing, autocross, performance street vehicles, and custom brake systems that use the correct 5.25" lug-mount spacing and compatible rotor dimensions.
The caliper must be matched to the correct rotor diameter, rotor width, mounting bracket, rotor offset, pad shape, master-cylinder bore, and front-to-rear brake balance. Proper component matching is critical for pedal feel and overall braking performance.
