Wilwood 120-11576 Forged Narrow Dynalite 4-Piston Caliper 3.50in Lug 1.25 Disc

Vehicle Fitment

• Universal - Competition, Off-Road, Road Racing, Sprint, Late Model, and Modified applications with 3.50" centered lug mount spacing and 1.25" wide rotors

Fitment Notes

• Universal caliper - no vehicle-specific OEM fitment; requires bracket or custom mount with 3.50" centered lug tabs
• Direct replacement for all previous Wilwood NDL calipers and competitive brands with 3.50" centered mounting tabs
• Compatible with rotors ranging from 11.75" to 12.72" diameter and designed for 1.25" wide rotors

Features

• Stress-flow forged aluminum body re-aligns grain structure within the caliper contour for superior strength over billet-machined designs
• FEA-generated radial transition design between piston housing and bridges reduces deflection and caliper separation under heavy braking
• Five-bolt bridge construction delivers maximum bridge strength and secure top-loaded pad retention
• SRS stainless steel bridge wear plates protect against pad gouging, eliminate pad rattle, and dampen brake squeal harmonics
• Four stainless steel pistons resist corrosion and limit heat transfer from pads to brake fluid
• Four-corner bleed screws allow full air evacuation and universal mounting in any front, rear, left, or right position
• Internal fluid passages eliminate external crossover tubes for a cleaner, more reliable setup
• Full PolyMatrix pad compound compatibility (BP-10 through BP-45) to suit street performance through high-heat racing environments

Specifications

• Piston Count: 4
• Piston Bore: 1.375 in (each)
• Total Piston Area: 2.97 in²
• Piston Type: Stainless Steel
• Mount Center: 3.50 in
• Mount Type: Lug (Universal)
• Mount Hole Size: 0.45 in
• Mount Height: 2.85 in
• Rotor Width: 1.25 in
• Maximum Rotor Diameter: 12.72 in
• Minimum Rotor Diameter: 11.75 in
• Pad Type: 7816 / 7216
• Fluid Inlet Thread: 1/8-27 NPT
• Finish: Type III Gray Anodize
• Material: Forged Aluminum

Included Components

• 1x Wilwood Forged Narrow Dynalite Caliper (120-11576)

Product Description

The Wilwood 120-11576 Forged Narrow Dynalite (FNDL) is a competition-grade 4-piston caliper built for demanding racing and performance applications. Featuring larger 1.375 in pistons paired with a 1.25 in wide rotor, it delivers greater clamping force than the narrower 0.81 in disc variants - making it a preferred choice for late models, modifieds, sprint cars, off-road builds, and road racing where wider rotors are part of the brake package.

The caliper body is stress-flow forged from premium aluminum alloy, which aligns the internal grain structure to the caliper's contour - eliminating the structural interruptions present in straight billet machining. Combined with FEA-optimized radial transitions at the bridge joints, the result is a caliper proven through structural deflection and volume displacement testing to outperform all comparable narrow mount designs. SRS stainless bridge wear plates, four-corner bleed screws, and internal fluid passages complete the package, allowing single-caliper fitment in any corner position without external crossover tubes.