Wilwood Forged Superlite Internal 4 Caliper | Rear RH 1.88/1.75 Piston, 1.250 Rotor (120-11329)
Wilwood Forged Superlite Internal 4 Caliper | Rear RH 1.88/1.75 Piston, 1.250 Rotor (120-11329)
SKU:120-11329
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The Wilwood Forged Superlite Internal 4 Caliper is a high-performance brake component designed for enhanced stopping power and heat management. Constructed from forged aluminum for strength and lightweight performance, this caliper features four pistons with sizes of 1.88 inches and 1.75 inches, providing increased clamping force and improved pad wear characteristics. The differential bore pistons help compensate for mechanical loading and temperature variations across the pad face, reducing taper wear during sustained high-temperature conditions. The ST models incorporate Thermlock pistons, which effectively block heat transfer from the pads, lowering temperatures within the caliper, fluid, and seals. This design ensures consistent brake performance under demanding driving conditions, making it suitable for high-performance applications.
Designed for rear installation on compatible vehicles, this caliper fits specific brake setups requiring a 1.250-inch rotor and is ideal for track, street, or performance driving. Its internal four-piston configuration offers superior braking force and modulation, especially in high-heat scenarios. The caliper is a direct replacement for existing rear brake components, ensuring straightforward installation. It is compatible with Wilwood’s brake pads and rotors specified for this model, and no additional modifications are typically necessary. This caliper is suited for enthusiasts seeking durable, heat-resistant braking solutions for demanding driving environments.
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Overview
Overview
FSLI4 and FSLI4/ST calipers provide the pad wear performance advantages of differential bore pistons with the option for ultimate heat protection using Thermlock pistons in the ST models. Differential piston bores compensate for leading-edge mechanical loading and temperature variances across the pad face to reduce pad taper wear in sustained high temperature applications. Thermlock pistons in the ST models block heat transfer from the pads and reduce temperatures in the caliper, fluid, and seals by up to 25% over standard stainless steel pistons. These are the go-to calipers for all types sustained hard braking on dirt and asphalt ovals and a wide range of off-road, rally and road course applications.
Wilwood is a leading manufacturer of high-performance brake systems and components to fit a wide range of track and street applications. They offer everything from individual components like rotors, calipers, and pads to complete bolt-on kits.
Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, we have developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Our core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motorsports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles.
With headquarters in Camarillo, California, Wilwood employs approximately 320 people. We have on-shelf stock of more than 300 different brake calipers, 200 rotor designs, 100 master cylinder designs and a wide assortment of brackets, fittings, valves and brake lines. Our off-shelf brake calipers range in size from tiny calipers used on go-carts and light duty industrial equipment to heavy-duty original equipment brakes for the U.S. military Humvee.
Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in conjunction with finite element analysis, dynamic test and cycle test equipment to find high-performance and reliability solutions for the most difficult braking tasks. Our extensive inventory of proprietary on-the-shelf components allow us to provide cost-effective solutions for unique brake applications.
Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers.
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