Silvo-Lite S3415.5MM Cast Replacement Piston GM 1.0L +0.5mm Oversize

The Silvo-Lite S3415.5MM is a single cast aluminum replacement piston engineered for General Motors 1.0-liter engines. Manufactured by United Engine & Machine Co. (UEM) under the trusted Silv-O-Lite brand, this piston is ground to a +0.5mm oversize to accommodate cylinders that have been bored or worn beyond standard dimensions.

Key Features:

• Cast aluminum construction — manufactured from quality cast aluminum for reliable OE-equivalent performance
• Diamond-finished skirt — Silv-O-Lite's proprietary diamond machining process produces exacting skirt tolerances for proper cylinder wall fit and long service life
• +0.5mm oversize — sized for use in freshly bored or honed cylinders at 0.5mm over standard bore
• Single piston — sold individually, allowing you to replace only the cylinder(s) required
• OE replacement design — engineered to restore factory compression and performance in GM 1.0L engines
• Production date traceability — casting date calendar on the interior skirt enables full production history tracking

Silv-O-Lite cast pistons have been a trusted name in engine rebuilding for over 100 years. Every manufacturing step — from alloying and casting to heat treating and diamond machining — is performed in-house by UEM to ensure consistent quality and dimensional accuracy across the entire product line.