Engineered using advanced FEA software to maximize mechanical strength, the KPMI heat-treated steel basewashers reliably control lateral valve spring movement and maintain proper installed spring height. Each basewasher features precision inner dimensions for an optimal fit on the valve guide with proper clearance for oversize options.

Crafted specifically for Harley-Davidson Panhead intake and exhaust applications, the shoulder diameters and corner radii are engineered with smooth transitions to eliminate sharp edges and ensure proper spring seating.

Key Features

Highlights

• Engineered using FEA design software to maximize mechanical strength
• Designed to safely control lateral spring movement and set installed spring height
• Shoulder diameters and specific corner radii prevent sharp edges and ensure proper spring seating
• Close net fit on valve guides with proper clearance for oversize guides

Compatibility

Compatible with 1948-1965 Harley-Davidson Panhead models (Intake and Exhaust).