Hastings Cast Rings +.040 for Twin Power Pistons Fits 1200cc Engines

• Size: +.040"
• Type: Piston Ring Set
• UPC: 075538084136

The Hastings Cast Piston Ring Set is designed for Twin Power pistons and offers a reliable solution for specific engine applications. The ring sets feature cast iron compression rings paired with three-piece flex-vent oil rings for durability and performance. Early 1200cc sets include a one-piece cast iron oil ring, while later models utilize the three-piece design. These sets are designed for two pistons and are available in various configurations to fit different engine types. - **Late 1200cc Models**: Replacement ring set (Hastings #6482) for 74" OEM applications and Twin Power 1200cc pistons with 1/16" compression rings. Standard bore size is 3.438". Fits 1955-1980 Big Twin models. - **Early 1340cc Shovelhead Models**: Replacement ring set (Hastings #6127) for OEM applications and Twin Power Shovelhead 1340cc pistons. Includes 3/16" oil rings and 1/16" compression rings. Standard bore size is 3.498". Fits 1978-Early 1983 FL and 1979-Early 1982 FX models. - **Late 1340cc Evolution Models**: Replacement ring set (Hastings #6164) for OEM applications and Twin Power Evolution 1340cc pistons. Includes 5/32" oil rings and 1/16" compression rings. Standard bore size is 3.498". Fits Late 1984-1999 Evolution Big Twin models. The rings are engineered with features like a reverse torsional taper face second ring and easy "spiral on" installation for the three-piece oil rings, ensuring ease of use and enhanced performance.