Description
Overview
The Wilwood Forged Narrow Superlite 6R Big Brake Kit, part number 140-15945, is listed as a front brake kit. Its published configuration pairs Forged Narrow Superlite 6R calipers with a six-piston differential-bore design, forged-aluminum caliper bodies, and 12.19 in (309.6 mm) rotors. Wilwood Polymatrix Q is the pad compound named in the product specifications.
The product name, kit number, and front position provide the essential identifiers for this brake-system listing. Retain part number 140-15945 when comparing the kit with vehicle and wheel information. The page identifies it as a front-only system and states that it does not incorporate a parking-brake function.
Rotor dimensions are published in both inch and metric measurements: 12.19 in (309.6 mm) in diameter and 0.81 in (20.6 mm) in thickness. The listed rotor configuration is directional-vane and slotted, with iron alloy specified as the rotor material. These details can help distinguish this kit from other Superlite 6R configurations.
Key specifications
- Kit part number: 140-15945
- Position: Front
- Caliper model: Forged Narrow Superlite 6R
- Caliper construction: Forged aluminum
- Pistons: Six-piston, differential-bore design
- Rotor diameter: 12.19 in (309.6 mm)
- Rotor thickness: 0.81 in (20.6 mm)
- Rotor listing: Directional-vane, slotted; iron alloy
- Pad compound: Wilwood Polymatrix Q
The page uses the term differential bore for the six-piston caliper configuration. For accurate identification, use the complete designation rather than shortening the product to a generic six-piston brake kit: Wilwood Forged Narrow Superlite 6R Front Kit 140-15945.
What is included
The product page’s hardware entry lists calipers, rotors, pads, brackets, and hardware. Polymatrix Q is the pad compound identified in the specifications. This listing of components is limited to what the page names; compare the supplied contents with the requirements of the intended vehicle and installation before work begins.
Buyer guidance
Confirm vehicle compatibility before ordering. The product page does not identify specific vehicle applications. It notes that wheel clearance depends on the particular wheel’s inner-barrel diameter and spoke design. Verify clearance with the wheels fitted to the vehicle and use Wilwood’s specific fitment guide or the retailer’s technical support for a definitive application check.
This is a front kit only. The page says it does not incorporate a parking-brake function and notes that the parking brake remains with the stock rear brakes. Buyers planning a broader brake-system change should account for that front-only scope rather than assuming a parking-brake provision is included.
Before installation, review the Wilwood Engineering Installation Instructions referenced on the product page for installation details, torque values, and bed-in procedures. Use the listed part number, caliper name, rotor dimensions, and wheel-clearance guidance as the starting points for confirming that the kit is appropriate for the intended application.
Fitment and ordering notes
- Confirm the exact model, part number, configuration, dimensions, and application against the information shown in this listing.
- Review the product images and listed attributes before ordering; fitment can vary by vehicle, equipment, year, and installation setup.
- Contact X Factor Motorsport for availability, fitment, product questions, or freight guidance before purchase.
