Cosworth HP Sport Front 4-Piston Big Brake Kit / 355x32mm Subaru WRX STI 04-07

Cosworth Sport brake kits feature fully forged calipers for optimal strength and light weight. The bolt in bridge design allows for a super stiff caliper without sacrificing cooling. The end result is better performance with less vibration, noise, and pad taper.

Cosworth 2-piece rotors are designed for 10-30% better airflow than directional vaned racing rotors. They were produced with a proprietary cast iron formula, which was specified with durability in mind. The hats and brackets are made with a special type of billet aerospace aluminum and are CNC machined in the USA.

All parts are bench tested prior to shipment. Each caliper is 100% pressure tested to 2,500 PSI. Every brake line is 100% pressure tested to 4,500 PSI. Every assembled two-piece rotor is tested for runout. Hats and brackets are CNC machined to ISO standards. Each kit is optimized for specific vehicle application.

Features:

• Bolt-in bridge minimizes caliper compliance
• 4 Piston Caliper Weight: 3.6 kg (7.94 lbs)
• 2-piece rotor design allows 10-30% better airflow greatly improving performance
• 4 Piston caliper uses standard FMSI D372 pad
• DOT Legal Stainless brake lines with clear abrasion-resistance cover
• Piston sizes are optimized for each vehicle application to maintain bias
• Differential piston sizes minimize pad taper for longer pad life and a firmer pedal
• Dust boots are standard for reduced maintenance
• All finished parts are 100% leak down and pressure tested