Wilwood Forged Superlite Internal 4 Caliper | Rear LH 1.88/1.75 Piston, 1.250 Rotor (120-11330)
Wilwood Forged Superlite Internal 4 Caliper | Rear LH 1.88/1.75 Piston, 1.250 Rotor (120-11330)
SKU:120-11330
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The Wilwood Forged Superlite Internal 4 Caliper is a high-performance braking component designed for enhanced pad wear performance and heat management. Constructed from forged aluminum for strength and lightweight durability, this caliper features differential bore pistons that help compensate for mechanical loading and temperature variations across the pad face. The inclusion of Thermlock pistons in the ST models provides superior heat protection by blocking heat transfer from the pads, thereby reducing temperatures within the caliper, fluid, and seals. These design features contribute to improved braking consistency, reduced pad taper wear during sustained high-temperature conditions, and increased overall brake system longevity, making it an ideal choice for demanding street and track applications.
This caliper is compatible with rear LH positions on vehicles requiring a 1.88/1.75 piston configuration and a 1.250 rotor diameter. It is suitable for use on various high-performance vehicles, particularly those involved in racing or spirited driving, where heat dissipation and pad wear are critical. The caliper is a direct bolt-on replacement for compatible brake setups, offering straightforward installation. It is part of Wilwood’s Superlite series, optimized for lightweight performance and durability, and is intended for use in high-stress environments such as track days, autocross, or aggressive street driving. The kit includes the caliper and necessary mounting hardware for a complete upgrade.
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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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