Wilwood 140-15345 Sprint Inboard Rear Brake Kit with Billet Narrow Dynalite Caliper

Upgrade sprint car braking performance with the Wilwood 140-15345 Sprint Inboard Brake Kit. Designed for rear applications, this complete brake system combines a lightweight billet narrow Dynalite four-piston caliper with an 11.75-inch slotted and scalloped steel rotor. The radial-mount configuration provides a clean, competition-focused installation for vehicles requiring reliable inboard braking performance and efficient heat management.
The gray anodized aluminum caliper offers a durable, corrosion-resistant finish while helping reduce unsprung weight. Its four-piston design delivers consistent clamping force across the rotor, supporting responsive pedal feel and dependable braking during demanding racing conditions. The slotted and scalloped steel rotor helps maintain friction-surface consistency while promoting airflow and reducing unnecessary rotating mass.
This Wilwood kit includes a 3 x 46 spline sprint car hat, making it suitable for compatible sprint car rear-end and hub configurations. The compact inboard layout is engineered for race applications where packaging, weight control, and serviceability are essential. As a complete brake solution, the kit simplifies component selection while providing matched braking hardware from a trusted performance manufacturer.
Feature: Rear sprint car inboard brake system
Feature: Billet narrow Dynalite four-piston caliper
Feature: Radial-mount caliper configuration
Feature: 11.75-inch slotted and scalloped steel rotor
Feature: Gray anodized aluminum caliper finish
Feature: 3 x 46 spline sprint car hat
Feature: Competition-oriented lightweight design
Feature: Air-restricted: No
Feature: Truck freight only: No
Verify rotor, spline, mounting, and vehicle compatibility before installation. Professional installation and proper brake system setup are recommended for safe, reliable performance.

Features:

• Rear sprint car inboard brake system

• Billet narrow Dynalite four-piston caliper

• Radial-mount caliper configuration

• 11.75-inch slotted and scalloped steel rotor

• Gray anodized aluminum caliper finish

• 3 x 46 spline sprint car hat

• Competition-oriented lightweight design

• Air-restricted: No

• Truck freight only: No