Proform Parts 141-685 HEI Distributor Locked-Out Vacuum Advance Chevy Small Big Block Red Cap

The Proform Parts 141-685 is an officially licensed Chevrolet Performance HEI (High Energy Ignition) distributor designed for Chevy small block and big block V8 engines. This premium racing distributor features a locked-out vacuum advance configuration, making it ideal for high-performance and racing applications where precise timing control is essential.

Key Features:

• Authentic Chevrolet Performance melonized steel gear (made in USA) - required for all Chevrolet Performance crate engines
• Locked-out vacuum advance for consistent racing performance
• High-performance module engineered with low saturation for maximum spark intensity
• Built-in coil with magnetic trigger for simplified installation
• Bronze bushings precisely installed and line-honed for perfect positioning
• Durable centerless ground coated shaft for reliable energy transfer
• Validated harness and capacitor for reliable energy flow
• Cast aluminum housing with polished finish
• Red high-dielectric cap with brass terminals
• Final assembly and individual inspection in Warren, Michigan

This distributor is designed for uncontrolled (non-emissions controlled) vehicles or vehicles used solely for closed competition racing purposes. It provides the power, stability, and precise timing control needed for serious performance applications.