What is the main advantage of the FSL4R model over older Superlite calipers?

The FSL4R model features updated internal fluid ports that eliminate external crossover tubes. This design also includes dual bleed screw assemblies, making the bleeding process more symmetrical and straightforward.

Can I mount these calipers on either side of the vehicle?

For symmetrical piston bore models, yes. They can be mounted on the left or right side, in either a leading or trailing position. Differential bore models still require specific left and right orientation but do not have a leading or trailing restriction.

What disc thickness is this caliper designed for?

This Wilwood Superlite 4R caliper is designed to work with brake discs that have a thickness of 1.25 inches.

Wilwood Forged Superlite 4R Brake Caliper 120-13230

Name: Wilwood Caliper-Forged Superlite 4R-L/H 1.88/1.62in Pistons 1.25in Disc
Brand: Wilwood
SKU: wilwood-wilwood-caliper-forged-superlite-4r-l-h-1-88-1-62in-pistons-1-25in-disc-t14-369657
Price: 292.16 USD
Availability: BackOrder

Wilwood Caliper-Forged Superlite 4R-L/H 1.88/1.62in Pistons 1.25in Disc

$292.16

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wilwood Forged Superlite 4R brake caliper. Features internal fluid ports and dual bleed screws for improved performance.

Key Features

Fits Wilwood Superlite 4R caliper series.
Features internal fluid ports, eliminating external crossover tubes.
Includes dual bleed screw assemblies for easier bleeding.
Symmetrical piston bore models can be mounted left or right, leading or trailing.
Differential bore models require specific left/right orientation but not leading/trailing.
Piston sizes are 1.88-inch and 1.62-inch.

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Product Details

If you're building a performance street car or heading to the track, upgrading your braking system is a smart move. The Wilwood Superlite 4R caliper is a well-known choice for serious driving, offering a solid foundation for improved stopping power. This particular model, the FSL4R, represents an updated design within the Superlite family, focusing on cleaner fluid routing and easier bleeding.

What's notable about the 4R series is the internal fluid ports. Instead of external crossover tubes, the fluid now travels internally. This not only gives a cleaner look but also means you get two bleed screw assemblies per caliper. This allows for symmetrical piston bore models to be mounted on either side, in either a leading or trailing position, simplifying setup. The differential bore models still need specific left and right orientation, but they don't require a specific leading or trailing setup. This caliper uses 1.88-inch and 1.62-inch pistons and is designed for a 1.25-inch disc thickness.