MAHLE 3021311B Performance Piston Ring Set 4.130" Bore 1.5mm Top Ring

The MAHLE 3021311B is a high-performance piston ring set engineered for precision engine builds requiring a 4.130-inch bore diameter. This premium ring set features steel Napier top rings with a 1.5mm thickness and .150" radial wall thickness, designed to deliver superior sealing and durability in demanding performance applications.

Key Features:

• 4.130-inch bore diameter for precise fitment
• Steel Napier design top compression ring for enhanced oil control
• 1.5mm top ring thickness (metric performance specification)
• .150-inch radial wall thickness for structural integrity
• Plain ring configuration with THM-13 profile
• Manufactured by MAHLE, a leading OEM and performance engine component supplier

MAHLE performance ring sets are manufactured to exacting tolerances using premium materials, ensuring optimal combustion sealing, reduced blow-by, and consistent performance across a wide range of racing and high-performance street applications. Each ring is precision-machined to maintain proper tension and conformability to cylinder walls.