Wilwood 120-11572 Forged Narrow Dynalite SI Lug Mount 4-Piston Universal Brake Caliper

Forged Narrow Dynalite

Wilwood’s new Forged Narrow Mount Dynalite (FNDL) calipers are ideal and extensively used in numerous competition applications including late models, modifieds, sprints, off-road, and road racing. The computer-aided design and stress analysis technology represents Wilwood’s latest innovation, providing substantial improvements in strength and performance over all comparable caliper models. The Forged Narrow Mount Dynalites are the strongest calipers in their class. FNDL calipers are a direct replacement for all previous Wilwood NDL calipers and similar competitive brands with 3.50” centered mounting lugs. A full five-bolt bridge provides superior bridge strength and positive retention of the top-loading 7816 or 7216 type brake pads. The full range of PolyMatrix pad compounds are available to match the braking response and heat range requirements for any competition application. The actual stress flow forging process re-aligns the metal’s granular structure within the contour of the caliper body. This process eliminates the breaks and interruptions in the internal granular structure that occur when machining a straight block. The FEA generated radial transition design eliminates steps and shoulders in the area between the piston housing body and the caliper bridges. Incorporating a radius into this transition area substantially increases resistance to deflection and caliper separation under load. Structural deflection and volume displacement testing has shown 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 fitted 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 under braking. Other standard Wilwood features include high-temperature seals and stainless steel pistons for corrosion resistance and to retard heat transfer from the pads. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws assure simple and 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 anodizing; newer production units feature a grey Type III anodize coating. Polished units are also available in certain piston sizes and rotor widths.