IAP AC198131P Grant Piston Ring Set for MAHLE 90.5mm Pistons

The IAP AC198131P is a Grant P1991 standard piston ring set specifically designed for MAHLE 90.5mm pistons used in air-cooled Volkswagen engines. This complete set includes rings for all four cylinders with groove dimensions of 1.5mm x 2.0mm x 4.0mm, providing precision fitment for stock and performance VW Type 1 applications including 1776cc and stroker engine builds.

Key Features:

• Complete 4-cylinder ring set with 1.5 x 2.0 x 4.0mm groove specifications
• Designed for MAHLE 90.5mm bore pistons
• High-grade grey iron compression rings manufactured to precision specifications
• Black phosphate coated top compression rings with beveled inside top edge for torsional twist characteristic
• Lower ridge relief design for enhanced oil scraping characteristics
• Second ring features scraper design for optimal second groove performance
• 3-piece circumferential oil rings provide quick seating, positive oil control, and extended service life
• Made in USA by Grant for reliable quality

This ring set delivers professional-grade sealing performance for air-cooled VW engine rebuilds and is engineered to meet OEM specifications while providing excellent durability for both street and performance applications.