Wiseco RCS09350 Tapered Ring Compressor Sleeve 93.5mm / 3.681in Bore

The Wiseco RCS09350 is a bore-specific tapered piston ring compressor sleeve designed for 93.50mm (3.681 inch) cylinder bores. Machined from the same forged aluminum used in Wiseco's performance pistons, this tool delivers professional-grade durability and precision for high-performance engine builds and rebuilds.

Key Features:

• Forged aluminum construction — machined from Wiseco sleeve forgings for exceptional strength and longevity
• Hard anodized and Teflon coated — reduces friction for smooth piston entry and long-term wear resistance
• Tapered bore design — smooth radius gradually compresses rings to the exact bore size, eliminating snagging or binding
• Even ring compression — compresses all rings smoothly and evenly, including thin high-performance oil rings prone to breakage
• Bore-specific fit — sized precisely for 93.50mm / 3.681 in. bores for a perfect, repeatable fit every time
• USA forged — produced in-house by Wiseco

Unlike adjustable band clamp or split-style ring compressors, this tapered sleeve design allows the piston to slide into the cylinder bore with minimal resistance, significantly reducing the risk of bent or broken rings during installation. It is an essential tool for any engine builder working with modern thin-profile piston rings. Wiseco RCS tapered sleeves are available across a wide range of bore sizes from 65.5mm to 105.1mm.