ALT The part first came to his attention through a teardown of a competitor’s sedan. Every year, Harrison bought one of every new vehicle on the market, took it apart, and laid the pieces out on long, foam-lined tables, side by side with their Harrison equivalents, so the engineers could compare. On the competitor’s firewall, bolted behind the master cylinder, was an S-shaped bracket of stamped steel, about the size of a playing card, bent along two axes. On Harrison’s firewall, bolted behind the master cylinder, was an S-shaped bracket of stamped steel, about the size of a playing card, bent along two axes. Just a bracket, bolted to the firewall. “What’s that?” Javier asked a tech. He glanced over. “Firewall S-bracket.” “What does it do?” “It’s a firewall S-bracket,” he repeated, impatiently.