Total Seal designed this CS2690-65 AP Advanced Profiling Piston Ring Set for use in all applications including extreme nitrous oxide and/or high boost.

All Total Seal AP Advanced Profiling Piston Ring sets feature AP steel top rings, conventional second rings and three-piece standard tension oil rings.

Total Seal CS2690-65 AP Advanced Profiling Piston Ring Set Features:

• Bore Diameter: 4.420 in.
• File Fit: Yes
• Gapless: No
• Gas Ported: No
• Top Ring Thickness: 1/16 in.
• Top Ring Material: Steel
• Top Ring Facing Material: Chromium Nitride
• Second Ring Thickness: 1/16 in.
• Second Ring Material: Cast Iron
• Oil Ring Thickness: 3/16 in.
• Oil Ring Material: Stainless Steel 3-piece
• Oil Ring Tension: Standard
• Oil Ring Tension Rating: 23 lb.
• Quantity: Sold as a set

Total Seal is known for their piston ring sets. They offer a wide selection of off-the-shelf options and also offer and the ability to custom order ring sets to meet your specifications. Total Seal also has a full line of tools, testers, and lubricants to aid in piston ring installation.