Narrow Dynalite Radial Mount Caliper – Part No: 120-13405-SI
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Billet Narrow Dynalite Radial Mount
Prod #: 120-13405-SI
Price: $260.73

Billet Narrow Dynalite Radial Mount - Product Summary
Caliper No: 120-13405-SI
Billet Narrow Dynalite Radial Mount

Piston Count 4
Piston Area (in²) 4.80
Piston Type Stainless
Dust Boot No
Rotor Dimensions
Rotor Width (in) 0.38
Rotor Diameter(in) 12.19
Pad Dimensions
Pad Area (in²) 6.36
Pad Volume (in³) 3
Duty Rating & Material
Material Billet Aluminium
Weight(Lbs) 3.2
Colors & Finish
Color Anodize
Finish Type III Anodize

Mount Center(in) 4.75
Mount Position
Mount Side Universal
Mount Type Radial
UPC Number
UPC 889545080728
Product Documents
Product Data Sheet

Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-13405-SI - Product Description

Billet Narrow Dynalite Radial Mount

Wilwood's venerable DynaLite calipers are used in all forms of racing, and the latest Billet Narrow Dynalite Radial Mount (NDLR) series are better than ever. Starting at just 3.20 pounds, this compact and lightweight caliper now incorporates a more rigid radial mount design. Engineered with a spacer-less body specifically for .38”, .810” and 1.00" width rotors and a center bridge bolt adding to overall caliper strength and positive retention of the top-loaded pads. A durable aluminum-oxide ceramic Mil-Spec Type III hard-anodized finish further enhances the durability of the caliper by resisting bore wear and surface abrasion.

Billet NDLR calipers can be directly mounted over studs on a 4.75" center, or used with a radial mount bracket kit in place of a tab-mount caliper. Internal damping springs, internal fluid crossover, controlled retraction in-bore seals, and 3/8” cross bolts for added strength and rigidity all adds up to consistent pedal feel from start to finish. Uses type 7816 brake pads with many Wilwood compound options to fine-tune your driving style and track conditions.

The Billet NDLR caliper is a compact, lightweight, and rugged caliper that provides strong clamping force from four stainless cup pistons. The bodies are fully CNC machined from billet with internal fluid ports that eliminate external fluid tubes. Each caliper is equipped with two corner bleeds and outboard inlets in the correct location for a standard Inboard mount. The bridges are equipped with stainless steel anti-rattle wear plates. These plates reduce bridge wear and provide smooth, rattle free operation of the pads. A center bridge bolt adds overall caliper strength and positive retention of the top loaded pads.

All Billet NDLR calipers are designed for long service using the 0.63” (16,0 mm) thick 7816 style brake pads. These pads are available in many different PolyMatrix compounds to provide the correct brake torque and heat range for any high performance or competition application. Radial mount bracket kits are used to install a radial mount caliper in place of a tab mount caliper. Brackets are available for both Sprint and Midget Inboard and Dirt Late Model applications for various rotor diameters.

Product Specifications

Rotor Compatibility
Rotor Width (in) 0.38
Maximum Rotor Width (in) 0.38
Minimum Rotor Width (in) 0.32
Maximum Rotor Diameter(in) 12.19
Minimum 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
Piston Specifications
Piston 1 Bore (in) 1.75
Piston 2 Bore (in) 1.75
Piston 3 Bore (in)
Total Piston Area (in²) 4.80

Mounting Specifications
Mount Type Radial
Mount Side Universal
Mount Center(in) 4.75
Mount Hole Size(in) 0.39
Mount Height(in) 1.24
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the Billet Narrow Dynalite Radial Mount Pad Dimensions for the Billet Narrow Dynalite Radial Mount Zoom Image
Axle Set P/N
Pad Type
Non-Bedded Pads - by Compounds
PolyMatrix B
Mount Dimensions for the Billet Narrow Dynalite Radial Mount Mount Dimensions for the Billet Narrow Dynalite Radial Mount Zoom Image
Mount Dimensions & Part Numbers

Dimensions for the Billet Narrow Dynalite Radial Mount Dimensions for the Billet Narrow Dynalite Radial Mount Zoom Image

Additional Notes

Parts & Accessories

O-Ring Kit 130-2655
Replacement Dust Boot N-A
Replacement Piston 1 200-7531
Replacement Piston 2 200-7531
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit 230-9982
Wear Plate L/H 300-5876
Wear Plate R/H 300-5876
Pad Retainer N-A
Bleed Screw Kit 220-0627
Self Bleeder Tube N-A
Cross-Over Tube N-A
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Version: 3.05 June 23, 2023