Supertech Ford Zetec 85mm Bore +3.5cc Dome 10.6:1 CR Pistons - Set of 4 (Excl Rings)

Forged from high-strength aluminum alloy, these Supertech pistons are built to handle the demands of a performance-oriented Ford Zetec engine. The 85mm bore size is a common upgrade for Zetec engines, and the +3.5cc dome volume, combined with the 10.6:1 compression ratio, is carefully calculated to offer an improved powerband without compromising reliability for most street-driven applications. This set includes four pistons, ready for your engine rebuild.

The forged construction means these pistons are significantly stronger and more durable than cast pistons, making them a solid choice for rebuilding or upgrading your Zetec engine. This strength is crucial for engines that see spirited driving or are tuned for increased output. The specific dome shape and volume are designed to work with the Zetec cylinder head to achieve the target compression ratio, which directly impacts engine efficiency and power delivery. Remember that these pistons are sold without rings, so you'll need to source a compatible ring set separately to complete the installation.

When rebuilding your engine with these pistons, it's important to ensure all other components are in good condition. Proper balancing of the rotating assembly, correct piston-to-wall clearance, and appropriate ring gap are critical for optimal performance and longevity. Always refer to the manufacturer's detailed installation instructions for precise measurements and procedures.