The March Performance 4475-08 is a two-piece pulley set from the Power & Amp Series, designed for 1988–2002 Chevrolet and GMC trucks equipped with 454 cubic inch engines using a 3-bolt crank pulley. This set helps maintain proper alternator function and charging at low engine speeds—ideal for high-demand electrical systems, towing, or stop-and-go traffic.

Key Features:

• Designed to maintain full electrical charging at idle
• Durable construction for high-load applications
• Black powder-coated finish for corrosion resistance and clean appearance
• 6-rib pulley surfaces for excellent belt traction
• Designed for OEM and performance alternator setups

Specifications:

• Belt Type: Serpentine
• Grooves: 6
• Includes:
  • 6-groove aluminum crank pulley
  • 6-groove steel alternator pulley
• Finish: Black powder coat
• Engine Compatibility: 454 CID big block (1988–2002) with 3-bolt crank pulley

Applications:
Perfect for GM trucks using 454 engines that require high-output alternators. This set supports optimal belt grip, durability, and consistent performance under load.