Wilwood 120-11578 Forged Narrow Dynalite, Lug Mount, 4-Piston Caliper.

Forged Narrow Dynalite

Wilwood’s new Forged Narrow Mount Dynalite (FNDL) brake calipers are ideal and widely used in numerous competition applications including late models, modifieds, sprints, off-road, and road racing. The computer-aided design and stress analysis technology is Wilwood’s latest innovation, providing substantial strength and performance improvements over all comparable caliper models. The Forged Narrow Mount Dynalite is the strongest caliper in its class.

FNDL calipers are a direct replacement for all earlier Wilwood NDL calipers and similar competitive brands, with 3.50” centered mounting tabs. A total of five bolts provide superior bridge strength and positive retention of either 7816 or 7216 style top-load brake pads. The full range of PolyMatrix pad compounds are available to match the braking response and heat range requirements of any competition application. The actual stress flow forging process realigns the metal’s grain structure within the contour of the caliper body. This process eliminates the breaks and interruptions in the internal grain structure that occur when machining a straight block. FEA generated radial transition design eliminates steps and shoulders in the area between the piston housing body and the caliper bridges. Incorporating a radius in this transition area substantially increases deflection and caliper separation resistance under load. Structural deflection and volume displacement testing has proven the Forged Narrow Mount Dynalite caliper to outperform all other. existing styles of this popular caliper size. The superior strength of this innovative design is combined with the proven performance features of previous Wilwood designs. Each caliper is equipped with Wilwood’s SRS stainless steel bridge plates. SRS plates eliminate bridge wear caused by pad rattle and extend the service life of the caliper body. The spring action of the SRS plates also eliminates pad rattle and dampens harmonic vibrations that contribute to squeal during braking. Other standard Wilwood features include high-temp seals and stainless steel pistons to eliminate corrosion and retard heat transfer from the pads. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws assure simple, effective air evacuation from the system and allow a caliper to be mounted in any position: front, rear, right, or left. To complete the package, Legacy FNDL calipers are finished in Wilwood’s exclusive black anodize; newer production units feature a gray Type III anodize coating. Polished units are also available in certain piston sizes and disc widths.

Pistons

Piston Quantity	4
Piston Area (in²)	1.98
Piston Type	Stainless
Dust Boot	No

Rotor Dimensions

Rotor Width (in)	0.81
Rotor Diameter (in)	12.72

Pad Dimensions

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

Use & Material Classification

Material
Weight (lbs)	4.1

Colors & Finish

Color	Anodized
Finish	Type III Anodized

Mounting

Mounting Center (in)	3.50
Mounting Position
Mounting Side	Universal
Mount Type	Lug

Rotor Compatibility

Rotor Width (in)	0.81
Max Rotor Width (in)	0.81
Min Rotor Width (in)	0.75
Max Rotor Diameter (in)	12.72
Min Rotor Diameter (in)	11.75

Brake Pad Specs

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 Specs

Piston Bore 1 (in³)	1.12
Piston Bore 2 (in³)	1.12
Piston Bore 3 (in)
Total Piston Area (in²)	1.98

Mounting Specs