1.5mm x 1.5mm x 3mm

Total Seal AP Advanced Profiling Steel Piston Ring Sets are ideal for engines with high amounts of boost / nitrous. They Rings can handle extreme abuse without wearing out cylinder walls. They feature Total Seal's PVD applied C33 Anti-Friction Coated Steel Top Rings, Cast or Napier 2nd Rings, and 3 Piece Oil Rings. All Ring Sets are sold as a set of 8 and are File to Fit unless otherwise specified. 

Most AP Steel Ring Sets are available with a Napier cut 2nd Ring. We use the AP Steel Top / Napier 2nd Ring Combination in most of our Race Engines with excellent results. The Napier 2nd Ring is highly recommended and helps with Oil Control.