Wilwood ST FSL4R Caliper with Thermlock® Pistons for High-Performance Braking
The 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.
Features:
- Differential bore pistons: Compensate for mechanical loading and temperature variances to reduce pad taper wear
- Thermlock® pistons: Minimize heat transfer, lowering caliper, fluid, and seal temperatures by up to 25%
- Type III hard anodize finish: Enhances wear resistance and corrosion protection
- Designed for high-performance
To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.
Depending on the package, we ship using different carriers according to the item's location, content, and size.
Freight truck & international items, will require up to 7 business days to ship due to size and logistics.
All orders made after 3:00pm ET will be processed the next business day.
Unless otherwise noted as "In Stock" with qty amount. Pre-Orders, Special orders, & Made to order items have an estimate of 5+ weeks for USA made parts and 10+ weeks for JDM/ Overseas parts. Please check with us for exact ETA as it will vary by brand and item.
Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $200.
Delivery Inspection & Damage Claims
Large, oversized, fragile, and performance parts must be inspected immediately upon delivery and before installation. Damage, missing parts, incorrect items, or cosmetic concerns must be reported within 3 business days of delivery with photos of the product, outer box, inner packaging, and shipping label.
Please keep all packaging until the item has been fully inspected. Claims may be denied if the item has been installed, mounted, modified, test-fitted, used, reported late, or if the packaging has been discarded.
All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs. Refusal to pay duties/taxes fees prior to delivery will have the product sent back to us. This will be treated a standard return and all fees including original and refusal shipping fees will be deducted from original amount.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.
Processing and logistics on in stock international orders will take up to 7 business days to process & ship as sometimes we only have 1 international pickup a week.
In stock, non pre-orders or special order items can be returned within 30 days of the product arriving to your house or place of work.
30 days, unused. Refund = item price minus 20% restocking fee. Original shipping is non-refundable. Return shipping (if we provide label) is also deducted.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Pre-Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail
Any loan orders will have a 10% cancelation fee to cover the loan processing fees or 3rd party merchant fees. No fee will be incurred if used as store credit.
For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
Wilwood ST FSL4R Caliper with Thermlock® Pistons for High-Performance Braking
