{"product_id":"wilwood-st-fsl4r-caliper-with-thermlock®-pistons-for-high-performance-braking","title":"Wilwood ST FSL4R Caliper with Thermlock® Pistons for High-Performance Braking","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 ST FSL4R caliper (Part Number: wil120-13264) is engineered for demanding racing and off-road applications where superior heat management and pad wear performance are critical. Featuring differential bore pistons, these calipers automatically compensate for mechanical loading and temperature variations across the pad face, helping to reduce pad taper wear during sustained high-temperature braking. This design ensures consistent braking performance on dirt and asphalt ovals, as well as rally and road course environments. The ST models also incorporate Thermlock® pistons, which significantly lower heat transfer from the pads into the caliper body, fluid, and seals. This innovation can reduce temperatures by up to 25% compared to standard stainless steel pistons, extending component life and enhancing brake system reliability during intense braking sessions. Built with a durable Type III hard anodize finish, these calipers offer exceptional resistance to wear and corrosion, making them suitable for rigorous off-road and high-performance racing conditions. The Wilwood ST FSL4R calipers are ideal for enthusiasts seeking maximum heat protection and wear performance in their braking systems, providing confidence and consistency across varied high-stress driving scenarios.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDifferential bore pistons: Compensate for mechanical loading and temperature variances to reduce pad taper wear\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThermlock® pistons: Minimize heat transfer, lowering caliper, fluid, and seal temperatures by up to 25%\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eType III hard anodize finish: Enhances wear resistance and corrosion protection\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for high-performance\u003c\/li\u003e\u003c\/ul\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":53456367780154,"sku":"wil120-13264","price":440.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0025\/9709\/3420\/files\/c10a57fb392174bfcf5792ab3d2aedfbL.jpg?v=1778780618","url":"https:\/\/www.kamispeed.com\/products\/wilwood-st-fsl4r-caliper-with-thermlock%c2%ae-pistons-for-high-performance-braking","provider":"KamiSpeed.com","version":"1.0","type":"link"}