Wilwood 150-4091K CM Metallic Brake Pads Pad 4108 for PS-1 PowerSports Caliper

Vehicle Fitment

• Wilwood PS-1 2-Piston Caliper - All applications using Pad Plate 4108
• Compatible applications include: go-karts, Jr. dragsters, UTVs, ATVs, snowmobiles, motorcycles, small vehicles, and light industrial/agricultural equipment fitted with the Wilwood PS-1 caliper

Fitment Notes

• Fits Wilwood PS-1 calipers using Pad Plate 4108 only. Verify caliper model and pad plate number before ordering.
• The PS-1 caliper fits rotors ranging from 6.00 in. to 9.00 in. diameter and 0.15 in. to 0.20 in. thickness only. Confirm rotor dimensions before ordering.
• Sold as a set - quantity sufficient to service both pistons of one PS-1 caliper.
• CM compound is formulated specifically for stainless steel rotors and is also compatible with steel, iron, super alloy, and titanium rotors.
• Pad does not require bedding and is ready for immediate use out of the box.
• Not compatible with OEM stock automotive calipers.

Features

• CM (Composite Metallic) compound is a sintered metallic formulation developed by Wilwood specifically for PowerSports and Industrial applications.
• High friction pad with smooth initial engagement - provides confident, consistent braking response across a wide temperature range.
• Low wear rate during sustained high-heat braking cycles makes this compound especially long-lasting in small vehicle and go-kart applications.
• High heat fade resistance maintains stopping power under repeated braking demands typical of kart racing and off-road use.
• Formulated for use with stainless steel rotors - a common rotor material in powersports and small vehicle brake systems.
• Integrally molded construction without shims provides a clean, rattle-free fit in the compact PS-1 caliper body.
• Compatible with slotted and cross-drilled rotors as well as standard plain face rotors.
• Made in the USA by Wilwood Engineering, Camarillo, California.

Specifications

• Part Number: 150-4091K
• Pad Plate: 4108
• Compound: CM - Composite Metallic (PowerSports / Industrial)
• Pad Thickness: 0.30 in.
• Pad Area: 2.0 in²
• Pad Volume: 0.36 in³
• Bedded: No
• Construction: Integrally molded without shims
• Dust Production Rating: N/A
• Pad Noise Rating: N/A
• Compatible Rotor Material: Stainless Steel, Steel, Iron, Super Alloy, Titanium
• Compatible Rotor Diameter Range: 6.00 in. - 9.00 in.
• Compatible Rotor Thickness: 0.15 in. - 0.20 in.
• Compatible Caliper: Wilwood PS-1 (2-Piston)
• UPC: 889545033243

Included Components

• 1x Set of CM Composite Metallic Brake Pads, Pad Plate 4108 (quantity sufficient for one PS-1 caliper)

Product Description

The Wilwood 150-4091K is a set of CM (Composite Metallic) sintered metallic brake pads for the Wilwood PS-1 two-piston caliper using Pad Plate 4108. Classified as a Power Sports / Industrial compound, these pads are purpose-built for go-karts, Jr. dragsters, UTVs, ATVs, snowmobiles, motorcycles, and light industrial equipment - any small vehicle application running the compact Wilwood PS-1 caliper. The CM compound was specifically formulated by Wilwood for stainless steel rotors common in these applications, though it is also compatible with steel, iron, super alloy, and titanium rotor materials.

The pads feature a high friction, smooth initial bite, strong fade resistance, and a low wear rate during sustained high-heat use - all essential characteristics for the repeated short-burst braking demands of kart racing and off-road sport. At just 0.30 in. thick with a compact 2.0 in² pad area, they are designed to fit the PS-1's minimal envelope precisely. No bedding is required - these pads are ready to use immediately upon installation. Confirm the PS-1 caliper and Pad Plate 4108 before ordering.