Wilwood 120-13406 SI Billet Narrow Dynalite Universal 4-Piston Radial Brake Caliper

Radial Mount Billet Narrow Dynalite Brake Caliper

Wilwood’s prestigious DynaLite calipers are used in every type of racing, and the newest Radial Mount Billet Narrow Dynalite (NDLR) series is better than ever. Starting at a mere 3.20 pounds (1.45kg), this compact, lightweight caliper now incorporates a stronger radial mount design. Engineered with a spacer-free body specifically for .38”, .810”, and 1.00” wide rotors, and a central bridge bolt that increases overall caliper strength and positive top-load pad retention. A durable Mil-Spec Type III hard-anodized, aluminum oxide ceramic finish further enhances caliper durability by resisting bore wear and surface abrasion.

Billet NDLR calipers can be mounted directly onto studs on 4.75” centers, or used with a radial mount bracket kit in place of a lug-mount caliper.

Internal dampening springs, internal fluid crossover, controlled retraction internal seals, and 3/8” cross bolts for added strength and stiffness combine to provide a consistent pedal feel from beginning to end. It uses 7816-type brake pads with many Wilwood compound options for fine-tuning your driving style and track conditions. The Billet NDLR caliper is compact, lightweight, and robust, providing strong clamping force from its four stainless steel cup pistons. The bodies are fully CNC machined from solid billet, with internal fluid ports eliminating external fluid tubes. Each caliper is fitted with two corner bleeders and external inlets at the correct location for standard internal mounting. The bridges are equipped with stainless steel anti-rattle wear plates. These plates reduce wear on the bridges and provide smooth, rattle-free pad operation. A central bolt on the bridge increases overall caliper strength and positive top-load pad retention. All Billet NDLR calipers are designed for a long service life using the .63” 16.0mm thick 7816-style brake pads. These pads are available in a variety of PolyMatrix compounds to provide the proper braking torque and heat range for any high-performance or racing application. Radial mount bracket kits are used to install a radial mount brake caliper in place of a lug mount brake caliper. Brackets are available for Sprint and Midget Inboard and Dirt Late Model applications for various rotor diameters.

Pistons

Piston Quantity	4
Piston Area (in²)	4.80
Piston Type	Stainless
Dust Boot	No

Rotor Dimensions

Rotor Width (in)	0.81
Rotor Diameter (in)	12.19

Pad Dimensions

Pad Area (in²)	6.36
Pad Volume (in³)	3

Service Rating & Material

Material	Billet Aluminum
Weight (lbs)	3.2

Colors & Finish

Color	Anodized
Finish	Type III Anodized

Mounting

Mounting Center (in)	4.75
Mounting Position
Mounting Side	Universal
Mounting Type	Radial

Specifications

Rotor Compatibility

Rotor Width (in)	0.81
Max Rotor Width (in)	0.81	Min Rotor Width (in)	0.75	Max Rotor Diameter (in)
Min Rotor Diameter (in)	11.75

Brake Pad Specifications

Brake Pad Type 1	7816
Brake Pad Type 2	7216
Brake Pad Type 3	N-A
Total Pad Area (in²)	6.36
Total Pad Volume (in³)	3
Mounting

Piston

Specifications

Piston 1 Bore (in)	1.75
Piston 2 Bore (in)	1.75
Piston 3 Bore (in)
Total Piston Area (in.²)	4.80

Mounting Specifications

Mount Type	Radial
Mounting Side	Universal
Mounting Center (inches)