MAHLE 4190MS-1115 Piston Ring Set Bore File Fit - 4.185

The MAHLE 4190MS-1115 is a premium file-fit piston ring set engineered for high-performance engine builds requiring precise bore sizing. Designed for engines with a 4.185" bore diameter, this ring set includes an oversized tolerance of +0.005" to accommodate custom fitting and finishing work.

Ring Configuration:

• Bore Size: 4.185" with +0.005" oversize allowance
• Top Ring Thickness: 0.043" (1.5mm)
• Second Ring Thickness: 1.5mm
• Oil Ring Thickness: 3.0mm
• File-Fit Design: Allows custom end gap adjustment for precise cylinder matching

MAHLE Quality Standards:

• Manufactured to OE specifications with premium materials
• Advanced coating technology for reduced friction and improved wear resistance
• Precise ring tension for optimal sealing and oil control
• Engineered for both performance and durability applications

File-fit rings are the preferred choice for professional engine builders and performance enthusiasts who demand exact fitment. Each ring must be carefully filed to achieve the proper end gap for your specific cylinder bore, ensuring optimal compression sealing and engine longevity. This ring set is compatible with flat-top, dish, or dome piston designs requiring these specific ring groove dimensions.