{"product_id":"wilwood-forged-superlite-fsl4r-st-aluminum-brake-caliper-with-thermlock-pistons-right","title":"Wilwood Forged Superlite FSL4R\/ST Aluminum Brake Caliper with Thermlock Pistons – Right","description":"FSL4R\/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. Featuring a wear resistant Type III hard anodize finish, 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.\n\u003cp\u003eThe Wilwood Forged Superlite FSL4R\/ST aluminum brake caliper offers high-performance braking suitable for demanding racing and off-road applications. Featuring a differential bore piston design, this caliper effectively compensates for mechanical loading and temperature variations across the pad face, which helps to minimize pad taper wear during extended high-temperature braking. The FSL4R\/ST model includes Thermlock® pistons, which significantly reduce heat transfer from the pads to the caliper, fluid, and seals, lowering temperatures by up to 25% compared to standard stainless steel pistons, thereby enhancing durability and performance in sustained hard braking scenarios.\u003cbr\u003eThe caliper is finished with a wear-resistant Type III hard anodize coating, ensuring longevity and resistance to harsh conditions encountered on dirt tracks, asphalt ovals, rally courses, and off-road terrains. Its forged aluminum construction provides a lightweight yet robust structure, contributing to improved vehicle handling and braking response. Designed for right-side installation, this caliper is ideal for high-performance vehicles requiring reliable, consistent braking under intense conditions.\u003cbr\u003eInstallation is straightforward with compatibility for a 1.88-inch or 1.75-inch piston configuration, and the caliper’s dimensions are optimized for various racing and off-road setups. The FSL4R\/ST caliper is a versatile choice for drivers who demand superior heat management, reduced wear, and durable construction in their braking systems, making it an essential component for serious racing, rally, or off-road applications.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDifferential bore pistons: Enhance pad wear performance by compensating for mechanical and temperature variances\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThermlock® pistons: Reduce heat transfer from pads, lowering caliper, fluid, and seal temperatures by up to 25%\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHard anodized finish: Provides wear resistance and durability in harsh environments\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eForged aluminum construction: Offers a lightweight yet strong caliper design for optimal performance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for high-stress racing and off-road applications: Suitable for dirt, asphalt ovals, rally, and off-road use\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbdoy\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Unknown\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eClearance Item: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbdoy\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":53617667080465,"sku":"120-13828","price":468.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/3830\/0689\/files\/1b2adaec620f01eb0c9d7f7c06ec0b03.jpg?v=1780477044","url":"https:\/\/shoprenegade.com\/products\/wilwood-forged-superlite-fsl4r-st-aluminum-brake-caliper-with-thermlock-pistons-right","provider":"Renegade Speed by Renegade Racing \u0026 Performance","version":"1.0","type":"link"}