Mahle Rings Performance Napier THM-13 4.025in x 1.5MM Plain Ring Set

Mahle OE offers this THM-13 piston ring set, designed for a 4.025-inch bore. These rings are a key component in your engine's combustion chamber, working to seal the gap between the piston and cylinder wall. Proper sealing is crucial for maintaining compression, controlling oil consumption, and ensuring efficient combustion. This set is built to perform reliably in your engine.

The Napier hook on the second ring is a notable design feature. This shape helps to scrape oil from the cylinder wall on the downstroke and allows oil to pass on the upstroke, contributing to better oil control. This can help reduce oil burning and keep your exhaust cleaner. Mahle OE is a well-known name in engine components, and this ring set reflects their commitment to providing solid parts for engine rebuilds.