S&S Cycle 91-7552 Big Bore Cylinder and Piston Kit Wrinkle Black - 88

The S&S Cycle 91-7552 is an 88 cubic inch big bore cylinder and piston kit designed to significantly increase displacement and performance on 1984-1999 Harley-Davidson Big Twin motorcycles. This complete kit features a 3-5/8" bore size with intermediate compression pistons specifically engineered to work with S&S Super Stock cylinder heads.

Key Features:

• 88" displacement upgrade with 3-5/8" (3.625") bore cylinders
• Designed for 5.375" deck height and 4-1/4" stroke configurations
• Intermediate compression piston design optimized for S&S Super Stock heads
• Premium wrinkle black powder-coat finish for durability and classic styling
• Increased fin area provides improved heat dissipation for cooler running
• Includes all necessary components for complete installation

Important Installation Notes:

• Crankcases must be bored to accept the larger 3-5/8" cylinders
• Stock flywheel assembly should be rebalanced for optimal performance
• Not compatible with stock Harley-Davidson cylinder heads - requires S&S Super Stock heads
• Shorter pushrods and intake manifold required
• EFI-equipped motorcycles must be recalibrated after installation

This kit provides a cost-effective path to substantial power gains while maintaining excellent reliability. S&S Cycle's precision engineering ensures proper fitment and long-lasting performance, backed by decades of experience in V-Twin performance upgrades.